Pyrone-3-carboxamide compounds and herbicidal composition thereof

Abstract

A compound of the formula (I) ##STR1## wherein (1) when R.sub.1 is a C.sub.2-11 alkyl, a lower alkenyl, a lower alkynyl, a cycloalkyl, a lower alkoxyalkyl, an aralkyl which may be substituted, a lower haloalkyl or a 5 or 6 membered heterocycle;R.sub.2, R.sub.3 and R.sub.4 are the same or different, hydrogen, a halogen, cyano, nitro, amino, a lower alkyl, a lower haloalkyl, hydroxy, a lower alkoxy, an aryloxy, carboxy, or a lower alkoxycarbonyl;R.sub.5 is hydrogen, a halogen, a C.sub.1-11 alkyl, an aryl which may be substituted, an aralkyl which may be substituted;R.sub.6 is a C.sub.1-11 alkyl, a lower alkenyl, a lower alkynyl, a cycloalkyl, a lower alkoxyalkyl, an aryl which may be substituted, an aralkyl which may be substituted, a lower haloalkyl, or a 5 or 6 membered heterocycle; or R.sub.5 and R.sub.6 may be combined to form a group of --(CH.sub.2).sub.m -- (m is 3 or 4);(2) when R.sub.1 is an aryl which may be substituted;R.sub.2, R.sub.3, R.sub.4 and R.sub.5 have the same meanings as defined above; R.sub.6 is a C.sub.1-11 alkyl, a lower alkenyl, a lower alkynyl, a cycloalkyl, a lower alkoxyalkyl, an aralkyl which may be substituted, a haloalkyl or a 5 or 6 membered heterocycle, or R.sub.5 and R.sub.6 may be combined to form a group of --(CH.sub.2).sub.m -- (m is 3 or 4);(3) when R.sub.1 is methyl;R.sub.2, R.sub.3, R.sub.4 and R.sub.5 have the same meanings as defined above; R.sub.6 is a C.sub.2-12 alkyl, a lower alkenyl, a lower alkynyl, a cycloalkyl, a lower alkoxyalkyl, an aryl which may be substituted, an aralkyl which may be substituted, a lower haloalkyl or a 5 or 6 membered heterocycle or R.sub.5 and R.sub.6 may be combined to form a group of --(CH.sub.2).sub.m -- (m is 3 or 4); or(4) when R.sub.1 and R.sub.6 are methyl;R.sub.2, R.sub.3 and R.sub.4 have the same meanings as defined above; R.sub.5 is a halogen, a C.sub.1-11 alkyl, an aryl which may be substituted or an aralkyl which may be substituted, which is useful as herbicide.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to novel pyrone-3-carboxamide compounds and herbicidal compositions thereof, and to novel growth regulating agents.

2. Description of the Prior Art

Certain compounds belonging to 4-oxo-4H-pyran-3-carboxamides have been mentioned in the literature.

That is, it has been known that the treatment of o-haloacetoanilides (2-chloro, 2-bromo, 2,4-dichloro or 2,5-dichloro compound) with polyphosphoric acid for an hour at 140.degree. C. gives the corresponding halogen derivatives of 2,6-dimethyl-4-oxo-N-phenyl-4H-pyran-3-carboxamide (A. K. Mallams and S. S. Islaelstam: J. Org. Chem., 29, 3548 (1964); A. K. Mallams: J. Org. Chem., 29, 3555 (1964)). This method using polyphosphoric acid was applied on other acetoacetoanilides (2-fluoro, 2-piperidino, 2-hexahydroazepinyl, 2-morpholino, 2-pyrrolidinyl or the like) or benzoylacetoanilides to yield the corresponding 4-oxo-4H-pyran-3-carboxamide compounds [R. Garner and H. Suschitzky: J. Chem. Soc. (C), 186 (1966)].

Also, 4-oxo-N-2,6-triphenyl-4H-pyran-3-carboxamide was obtained by treating benzoylacetoanilide with succinyl dichloride [Zankowska-Jasinsca. W. et al.: Zesz. Nawk. Uniw. Jagiellon., Pr. Chem. 1980, 25, 7; ibid 1976, 21, 141].

The formation of 2,6-dimethyl-N-(4-nitrophenyl)-4-oxo-4H-pyran-3-carboxamide was identified as the reaction product between p-nitroaniline and diketene [(Kato and Kubota; Yakugakuzassi, 87, 1212 (1967)]. Also, N-(2-chlorophenyl)-2,6-dimethyl-4-oxo-4H-pyran-3-carboxamide was obtained by treating 2,6-dimethyl-4-oxo-4H-pyran-3-carboxylic acid with thionyl chloride followed by the reaction with o-chloroaniline, or by heating p-nitrophenyl ester of 2,6-dimethyl-4-oxo-4H-pyran-3-carboxylic acid and o-chloroaniline for 4.3 hours at 110.degree. C. [Toda: Yakugakuzassi, 87, 1351 (1967)]. This literature disclosed pyrone-3-carboxamide compounds which were obtained by the reaction of 2-aminotroponesor 4-aminotropolones with diketene.

Also, in Japanese Patent Publication No. 45(1970)-31663, it disclosed a process for preparing 2,6-dimethyl-4-oxo-4H-pyran-3-carboxamides which comprises reacting isocyanates and diketene in the presence of an acid catalyst, and specifically disclosed in the working examples 2,6-dimethyl-4-oxo-N-phenyl-4H-pyran-3-carboxamide, 2,6-dimethyl-N-(2-methylphenyl)-4-oxo-4H-pyran-3-carboxamide, N-(2-chlorophenyl)-2,6-dimethyl-4-oxo-4H-pyran-3-carboxamide, 2,6-dimethyl-N-(2-nitrophenyl)-4-oxo-4H-pyran-3-carboxamide, N-(2,5-dichlorophenyl)-2,6-dimethyl-4-oxo-4H-pyran-3-carboxamide, 2,6-dimethyl-N-(3-nitrophenyl)-4-oxo-4H-pyran-3-carboxamide and 2,6-dimethyl-N-(4-methylphenyl)-4-oxo-4H-pyran-3-carboxamide.

Further, 2,6-dimethyl-4-oxo-N-phenyl-4H-pyran-3-carboxamide, N-(4-methoxyphenyl)-2,6-dimethyl-4-oxo-4H-pyran-3-carboxamide and N-(4-chlorophenyl)-2,6-dimethyl-4-oxo-4H-pyran-3-carboxamide have been disclosed as the reaction products between 3-morpholinocrotonanilide compounds and diketene [Kato et al: Yakugakuzassi, 101, 43 (1981)].

In addition, there have been reports about pyrone-3-carboxamide compounds which correspond to aminotropones [H. Toda and S. Seto: Chem. Pharm. Bull., 19, 1477 (1971)], aminopyridines [T. Kato et al: Chem. Pharm. Bull., 20, 133 (1972); ibid. 28, 2129 (1980); H. L. Yale et al: J. Heterocyclic Chem., 14, 637 (1977)] and 2-amino-1,3,4-thiadiazoles [R. F. Lauer et al: J. Heterocyclic Chem., 13, 291 (1976)], respectively.

It was disclosed in the above mentioned Japanese Patent Publication No. 45(1970)-31663 that 2,6-dimethyl-4-oxo-4H-pyran-3-carboxamides have utility as agricultural drugs such as a control agent of sheath blight of rice, nematicide or acaricide, or drugs such as an antiviral agent or the like, but did not disclose any data supporting such utility.

There have been no reports on the pyrone-3-carboxamide compounds represented by the formula (I) of the present invention (set forth below), nor has there been any suggestion regarding possible plant growth inhibitory activity.

SUMMARY OF THE INVENTION

This invention provides compounds of the formula (I). ##STR2##

In the formula (I),

(1) when

R.sub.1 is a C.sub.2-11 alkyl, a lower alkenyl, a lower alkynyl, a cycloalkyl, a lower alkoxyalkyl, an aralkyl which may be substituted, a lower haloalkyl or a 5 or 6 membered heterocycle; R.sub.2, R.sub.3 and R.sub.4 are the same or different, hydrogen, a halogen, cyano, nitro, amino, a lower alkyl, a lower haloalkyl, hydroxy, a lower alkoxy, an aryloxy, carboxy, or a lower alkoxycarbonyl; R.sub.5 is hydrogen, a halogen, a C.sub.1-11 alkyl, an aryl which may be substituted, an aralkyl which may be substituted; R.sub.6 is a C.sub.1-11 alkyl, a lower alkenyl, a lower alkynyl, a cycloalkyl, a lower alkoxyalkyl, an aryl which may be substituted, an aralkyl which may be substituted, a lower haloalkyl, or a 5 or 6 membered heterocycle; or R.sub.5 and R.sub.6 may be combined to form a group of --(CH.sub.2).sub.m -- (m is 3 or 4);

(2) when

R.sub.1 is an aryl which may be substituted; R.sub.2, R.sub.3, R.sub.4 and R.sub.5 have the same meanings as defined above; R.sub.6 is a C.sub.1-11 alkyl, a lower alkenyl, a lower alkynyl, a cycloalkyl, a lower alkoxyalkyl, an aralkyl which may be substituted, a haloalkyl or a 5 or 6 membered heterocycle, or R.sub.5 and R.sub.6 may be combined to form a group of --(CH.sub.2).sub.m -- (m is 3 or 4);

(3) when

R.sub.1 is methyl; R.sub.2, R.sub.3, R.sub.4 and R.sub.5 have the same meanings as defined above; R.sub.6 is a C.sub.2-12 alkyl, a lower alkenyl, a lower alkynyl, a cycloalkyl, a lower alkoxyalkyl, an aryl which may be substituted, an aralkyl which may be substituted, a lower haloalkyl or a 5 or 6 membered heterocycle or R.sub.5 and R.sub.6 may be combined to form a group of --(CH.sub.2).sub.m -- (m is 3 or 4); or

(4) when

R.sub.1 and R.sub.6 are methyl; R.sub.2, R.sub.3 and R.sub.4 have the same meanings as defined above; R.sub.5 is a halogen, a C.sub.1-11 alkyl, an aryl which may be substituted or an aralkyl which may be substituted.

Also, the invention provides a herbicidal composition which comprises a compound of the above mentioned formula (I) as the active ingredient.

DESCRIPTION OF PREFERRED EMBODIMENTS

The term "lower" which is used to describe the lower alkyl, lower alkoxy or like group in this invention means a group containing 1-5 carbon atoms. Specifically, the lower alkyl group may be methyl, ethyl, propyl, isopropyl, butyl, isobutyl, pentyl or isopentyl; the lower alkoxy group may be methoxy, ethoxy, propoxy, isopropoxy or butoxy; the lower alkoxycarbonyl group may be methoxycarbonyl, ethoxycarbonyl, propoxycarbonyl or butoxycarbonyl; the lower alkenyl or lower alkynyl group may be vinyl, allyl, isopropenyl 2-butenyl, 1,3-butadienyl, 2-pentenyl, 1,4-pentadienyl, 1,6-heptadienyl, 1-hexenyl, ethynyl or 2-propynyl.

Examples of the cycloalkyl groups include cyclopropyl, cyclopentyl or cyclohexyl.

Examples of the lower halolakyl groups include trifluoromethyl or chloromethyl.

Examples of the lower alkoxyalkyl groups include methoxymethyl, ethoxymethyl, propoxymethyl or butoxymethyl.

Examples of the lower alkoxycarbonyl group include methoxycarbonyl, ethoxycarbonyl or propoxycarbonyl.

Examples of the halogen atom include chlorine, bromine, fluorine or iodine.

Examples of the aryl in the aryl group which may be substituted include phenyl or naphthyl.

Examples of the aralkyl in the aralkyl group which may be substituted include benzyl, 3-phenylpropyl, 4-phenylbutyl.

Examples of the aryloxy groups include phenyloxy or naphthyloxy.

The 5- or 6-membered heterocyclic group means a 5- or 6-membered group containing one to three hetero atoms selected from nitrogen atom, oxygen atom and sulfur atom. Examples of the 5-membered heterocyclic groups are furyl, tetrahydrofuryl, thienyl, thiazolyl, isothiazolyl, oxazolyl, isooxazolyl or pyrazolyl and the 6-membered heterocyclic groups are pyridyl, pyrimidinyl, pyrazinyl or pyridazinyl. These heterocyclic groups may be substituted by alkyl as methyl or ethyl, halogen atom or phenyl. When the heterocyclic group is substituted by phenyl, it may form a condensed ring combining the two adjacent carbon atoms in the heterocyclic group with phenyl group. Examples of the condensed ring are benzothiazolyl, benzofuryl, quinazolinyl or quinoxalinyl group.

Examples of substituents on the aryl or aralkyl group which may be substituted include a halogen, a lower alkyl, a lower alkoxy or cyano and numbers of the substituents are preferred to be one to three.

The compound of the formula (I) in this invention may form an addition salt with an acid such as hydrochloric acid, sulfuric acid, phosphoric acid, methanesulfonic acid, p-toluenesulfonic acid or trifluoroacetic acid when sufficiently basic, and also form a salt with an inorganic base when it contains a carboxyl group. Such salts are also included in this invention.

The compound of the formula (I) in this invention may be prepared by any of the following methods. ##STR3## [R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 of the formula (II) and (II') are the same as those in the formula (I), R.sub.7 is a dialkylamino and n is an integer from 0 to 6.]

This method comprises reacting a compound of the general formula (II) or (II') with diketene in an appropriate solvent (e.g., toluene or xylene) at a temperature of e.g., -20.degree. C..about.130.degree. C. This method is suitable to obtain a compound in which R.sub.5 is hydrogen and R.sub.6 is methyl.

The compounds (II) and (II') which may be used as the starting material of the above reaction can be easily prepared by condensing a .beta.-ketoamide derivative of the general formula: ##STR4## with an amine of the general formula: R.sub.7 (CH.sub.2).sub.n NH.sub.2, wherein the symbols have the same meanings as defined above. ##STR5## [R.sub.1, R.sub.2, R.sub.3 and R.sub.4 have the same meanings as those in the general formula (I), R.sub.8 is an alkyl, cycloalkyl, aryl or heterocyclic group.]

This method comprises reacting a compound of the general formula (III) with diketene in the presence of a tertiary base in an appropriate solvent (e.g., toluene or xylene) at a temperature -20.degree. C..about.130.degree. C. This method is suitable to obtain a compound in which R.sub.5 is hydrogen and R.sub.6 is methyl.

The compound (III) as the starting material in the above reaction can be easily obtained by condensing a .beta.-ketoamide derivative of the general formula: ##STR6## with an amine of the general formula: R.sub.8 NH.sub.2, wherein the symbols are the same as defined above. ##STR7## R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and n are the same as those in the general formulae (I) and (II), R.sub.9 and R.sub.10 are hydrogen, an alkyl or phenyl, or when both R.sub.9 and R.sub.10 are alkyl, they may be combined to form a cycloalkyl.

This method comprises reacting a compound of the general formula (II) or (II') with a compound of the general formula (IV), in the presence or absence of an appropriate solvent (e.g., toluene, benzene or mesitylene) under heating (e.g., at 100.degree. to 170.degree. C.).

The compounds (IV) of the starting material in the above reaction can be prepared by a known method e.g., Chem. Pharm. Bull. 31, 1896 (1983); Japanese Unexamined Patent Publication Nos. 106478/1979 and 22077/1986. ##STR8## R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.8, R.sub.9 and R.sub.10 have the same meanings as defined above.

This method comprises reacting a compound of the general formula (III) with a compound of the general formula (IV) in the presence or absence of a tertiary base in the presence or absence of an appropriate solvent (e.g., toluene, benzene or mesitylene) under heating (e.g., at 100.degree..about.170.degree. C.). ##STR9## [R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and n have the same meanings as defined above and R.sub.11 is alkyl group.]

This method comprises reacting a compound of the general formula (II) or (II') with a compound of the general formula (V) in the presence of molecular sieve, in an inert solvent (e.g., xylene or mesitylene) under heating.

The compounds (I) of this invention are useful as a herbicide for a paddy field, vegetable field (field farm), fruit garden, meadow, lawn, woods and other fields of grass.

For herbicidal applications, the compounds of the present invention are generally formulated into herbicidal compositions. These compositions can be solids such as dusts, granules, or wettable powders; or they can be liquids such as solutions, aerosols, or emulsifiable concentrates.

For example, solid compositions such as dusts, wettable powders or granules can be prepared by blending the active compound with a solid inert carrier such as the kaolinites, bentonites, clays, talcs, silicas and the like. Liquids compositions such as solutions or emulsifiable concentrates can be prepared by dissolving the active compound with a liquid inert solvent such as xylene, ethanol, acetone, dimethylformamide, some vegetable oils, water and so on.

Surface active agents for wetting, dispersing or emulsifying are generally used with the herbicidal compositions as above defined. For example, polyoxyethylene-alkyl ethers, polyoxyethylene-sorbitan fatty acid esters, and other nonionic types; alkyl and alkylarlyl sulfonates and sulfates and their sodium salts and other anionic types or other types of surface active agents may be employed.

For pre-emergence applications these herbicidal compositions are usually applied either as sprays, dusts, or granules in the area in which suppression of vegetation is desired. For post-emergence applications control of established plant growth, sprays or dusts are most commonly used. These formulations may contain 10-80% for wettable powders, 1-10% for granules, or 10-50% for emulsifiable concentrates by weight of active ingredient. Dosage of these herbicidal compositions for pre-emergence or post-emergence applications is generally 0.1-2 Kg by weight of active ingredient, per acre.

This invention is illustrated further by examples hereinafter. Also, growth-regulating activities on plants of the compounds of the invention are shown in reference examples.

Furthermore, related specific compounds in addition to the compounds shown in the examples are as follows;

N-(4-bromo-2,6-diethylphenyl)-6-methyl-4-oxo-2-phenyl-4H-pyran-3-carboxamide, N-(4-chloro-2,6-diethylphenyl)-6-methyl-4-oxo-2-phenyl-4H-pyran-3-carboxamide, 2-butyl-N-(4-chloro-2,6-diethylphenyl)-6-methyl-4-oxo-4H-pyran-3-carboxamide, 2-butyl-N-(4-chloro-2,6-diethylphenyl)-5,6-dimethyl-4-oxo-4H-pyran-3-carboxamide, 2-(3-cyanophenyl)-6-methyl-4-oxo-N-phenyl-4H-pyran-3-carboxamide, 2-(3-methoxyphenyl)-6-methyl-4-oxo-N-phenyl-4H-pyran-3-carboxamide, 5-bromo-N-(2,6-diethylphenyl)-6-methyl-4-oxo-2-propyl-4H-pyran-3-carboxamide, 5-bromo-2-butyl-N-(2,6-diethylphenyl)-6-methyl-4-oxo-4H-pyran-3-carboxamide 5-bromo-N-(4-bromo-2,6-diethylphenyl)-6-methyl-4-oxo-2-propyl-4H-pyran-3-carboxamide, 5-bromo-N-(4-bromo-2,6-diethylphenyl)-2-butyl-6-methyl-4-oxo-4H-pyran-3-carboxamide, 5-chloro-N-(2,6-diethylphenyl)-6-methyl-4-oxo-2-propyl-4H-pyran-3-carboxamide, 2-butyl-5-chloro-N-(2,6-diethylphenyl)-6-methyl-4-oxo-4H-pyran-3-carboxamide, 5-chloro-N-(4-chloro-2,6-diethylphenyl)-6-methyl-4-oxo-2-propyl-4H-pyran-3-carboxamide, 2-butyl-5-chloro-N-(4-chloro-2,6-diethylphenyl)-6-methyl-4-oxo-4H-pyran-3-carboxamide, N-(4-bromo-2,6-diethylphenyl)-5-chloro-6-methyl-4-oxo-2-propyl-4H-pyran-3-carboxamide, N-(4-bromo-2,6-diethylphenyl)-2-butyl-5-chloro-6-methyl-4-oxo-4H-pyran-3-carboxamide, 5-bromo-N-(4-chloro-2,6-diethylphenyl)-6-methyl-4-oxo-2-propyl-4H-pyran-3-carboxamide, 5-bromo-2-butyl-N-(4-chloro-2,6-diethylphenyl)-6-methyl-4-oxo-4H-pyran-3-carboxamide, 2-(3-trifluoromethylphenyl)-N-(2,4-difluorophenyl)-6-methyl-4-oxo-4H-pyran-3-carboxamide, 2-(3-bromophenyl)-N-(2,4-difluorophenyl)-6-methyl-4-oxo-4H-pyran-3-carboxamide, N-(2,4-difluorophenyl)-6-methyl-2-(3-nitrophenyl)-4-oxo-4H-pyran-3-carboxamide, 2-ethoxymethyl-N-(2,6-diethylphenyl)-6-methyl-4-oxo-4H-pyran-3-carboxamide, 2-ethoxymethyl-N-(2,6-diethylphenyl)-5,6-dimethyl-4-oxo-4H-pyran-3-carboxamide, N-(4-bromo-2,6-diethylphenyl)-2-ethoxymethyl-6-methyl-4-oxo-4H-pyran-3-carboxamide, N-(4-bromo-2,6-diethylphenyl)-2-ethoxymethyl-5,6-dimethyl-4-oxo-4H-pyran-3-carboxamide, N-(2,6-diethylphenyl)-6-methyl-4-oxo-2-propoxymethyl-4H-pyran-3-carboxamide N-(2,6-diethylphenyl)-5,6-dimethyl-4-oxo-2-propoxymethyl-4H-pyran-3-carboxamide, N-(4-bromo-2,6-diethylphenyl)-6-methyl-4-oxo-2-propoxymethyl-4H-pyran-3-carboxamide, N-(4-bromo-2,6-diethylphenyl)-5,6-dimethyl-4-oxo-2-propoxymethyl-4H-pyran-3-carboxamide, 2-(2-ethoxyethyl)-N-(2,6-diethylphenyl)-6-methyl-4-oxo-4H-pyran-3-carboxamide, 2-(2-ethoxyethyl)-N-(2,6-diethylphenyl)-5,6-dimethyl-4-oxo-4H-pyran-3-carboxamide, 2-(2-ethoxyethyl)-N-(2,6-diethylphenyl)-5,6-dimehtyl-4-oxo-4H-pyran-3-carboxamide, N-(4-bromo-2,6-diethylphenyl)-2-(2-ethoxyethyl)-6-methyl-4-oxo-4H-pyran-3-carboxamide, N-(4-bromo-2,6-diethylphenyl)-2-(2-ethoxyethyl)-5,6-dimethyl-4-oxo-4H-pyran-3-carboxamide, 5-bromo-N-(2,6-diethylphenyl)-2-methoxymethyl-6-methyl-4-oxo-4H-pyran-3-carboxamide, 5-bromo-N-(4-bromo-2,6-diethylphenyl)-2-methoxymethyl-6-methyl-4-oxo-4H-pyran-3-carboxamide, 5-bromo-N-(2,6-diethylphenyl)-6-methyl-4-oxo-2-propoxymethyl-4H-pyran-3-carboxamide, 5-bromo-N-(4-bromo-2,6-diethylphenyl)-6-methyl-4-oxo-2-propoxymethyl-4H-pyran-3-carboxamide 5-bromo-2-(2-ethoxyethyl)-N-(2,6-diethylphenyl)-6-methyl-4-oxo-4H-pyran-3-carboxamide, 5-bromo-N-(2,6-diethylphenyl)-2-methoxymethyl-6-methyl-4-oxo-4H-pyran-3-carboxamide, 5-bromo-N-(4-bromo-2,6-diethylphenyl)-2-(2-ethoxyethyl)-6-methyl-4-oxo-4H-pyran-3-carboxamide, N-(4-bromo-2,6-diethylphenyl)-5-chloro-2-methoxymethyl-6-methyl-4-oxo-4H-pyran-3-carboxamide, 5-chloro-N-(2,6-diethylphenyl)-6-methyl-4-oxo-2-propoxymethyl-4H-pyran-3-carboxamide, N-(4-bromo-2,6-diethylphenyl)-5-chloro-6-methyl-4-oxo-2-propoxymethyl-4H-pyran-3-carboxamide, 5-chloro-2-(2-ethoxyethyl)-N-(2,6-diethylphenyl)-6-methyl-4-oxo-4H-pyran-3-carboxamide, N-(4-bromo-2,6-diethylphenyl)-5-chloro-2-(2-ethoxyethyl)-6-methyl-4-oxo-4H-pyran-3-carboxamide, 5-bromo-N-(4-bromo-2,6-diethylphenyl)-2-ethoxymethyl-6-methyl-4-oxo-4H-pyran-3-carboxamide, 5-bromo-2-ethoxymethyl-N-(2,6-diethylphenyl)-6-methyl-4-oxo-4H-pyran-3-carboxamide, N-(4-bromo-2,6-diethylphenyl)-5-chloro-2-ethoxymethyl-6-methyl-4-oxo-4H-pyran-3-carboxamide, 5-chloro-2-ethoxymethyl-N-(2,6-diethylphenyl)-6-methyl-4-oxo-4H-pyran-3-carboxamide, 5-dodecyl-N-(2,6-diethylphenyl)-6-methyl-4-oxo-2-propyl-4H-pyran-3-carboxamide, 2-ethyl-4-oxo-N-phenyl-6-(3-pyridyl)-4H-pyran-3-carboxamide, N-(2,6-diethyl-4-trifluoromethylphenyl)-5,6-dimethyl-4-oxo-2-propyl-4H-pyran-3-carboxamide, 5-bromo-N-(4-cyanophenyl)-4-oxo-2-phenyl-6-propyl-4H-pyran-3-carboxamide, 2-(3-chlorophenyl)-5-ethyl-6-hexyl-N-(3-nitrophenyl)-4-oxo-4H-pyran-3-carboxamide, N-(4-aminophenyl)-5-hexyl-6-nonyl-4-oxo-2-phenyl-4H-pyran-3-carboxamide, 6-dodecyl-N-(4-hydroxyphenyl)-5-nonyl-4-oxo-2-phenyl-4H-pyran-3-carboxamide 6-allyl-5-dodecyl-N-(2,6-diethyl-4-methoxyphenyl)-4-oxo-2-phenyl-4H-pyran-3-carboxamide, 4-oxo-N-(4-phenoxyphenyl)-5,6-diphenyl-6-(2-propynyl)-4H-pyran-3-carboxamide, N-(2-carboxyphenyl)-6-cyclopropyl-4-oxo-2-phenyl-5-phenylmethyl-4H-pyran-3-carboxamide, N-(2-methoxycarbonylphenyl)-6-methoxymethyl-4-oxo-2-phenyl-4H-pyran-3-carboxamide, N-(2,6-diethylphenyl)-4-oxo-2,5-diphenyl-6-phenylmethyl-4H-pyran-3-carboxamide, N-(2,6-diethylphenyl)-4-oxo-2-phenyl-6-trifluoromethyl-4H-pyran-3-carboxamide, 5,6,7,8-tetrahydro-4-oxo-N-2-diphenyl-4H-benzopyran-3-carboxamide, 5-bromo-N-(4-cyano-2,6-diethylphenyl)-2-methyl-4-oxo-6-propyl-6-propyl-4H-pyran-3-carboxamide, 5-ethyl-6-heptyl-N-(4-nitrophenyl)-2-methyl-4-oxo-4H-pyran-3-carboxamide, N-(4-aminophenyl)-6-dodecyl-2-methyl-4-oxo-5-pentyl-4H-pyran-3-carboxamide, 6-allyl-2-methyl-5-octyl-4-oxo-N-(4-trifluoromethylphenyl)-4H-pyran-3-carboxamide, 5-dodecyl-N-(4-hydroxyphenyl)-2-methyl-4-oxo-6-(2-propynyl)-4H-pyran-3-carboxamide, 6-cyclohexyl-2-methyl-N-(4-methoxyphenyl)-4-oxo-5-phenyl-4H-pyran-3-carboxamide, 6-butyl-2-methyl-4-oxo-N-(4-phenoxyphenyl)-5-phenylmethyl-4H-pyran-3-carboxamide, 5-chloro-N-(4-ethoxycarbonyl-2,6-diethylphenyl)-2-methyl-4-oxo-6-phenylmethyl-4H-pyran-3-carboxamide, N-(4-carboxyphenyl)-2-methyl-5-(2-methylpropyl)-4-oxo-6-(3-pyridyl)-4H-pyran-3-carboxamide, 5-bromo-2,6-dimethyl-4-oxo-N-phenyl-4H-pyran-3-carboxamide, 5-chloro-N-(4-cyanophenyl)-2,6-dimethyl-4-oxo-4H-pyran-3-carboxamide, N-(4-amino-2,6-diethylphenyl)-5-hexyl-2,6-dimethyl-4-oxo-4H-pyran-3-carboxamide, N-(2,6-diethyl-4-trifluoromethylphenyl)-2,6-dimethyl-5-nonyl-4-oxo-4H-pyran-3-carboxamide, 5-dodecyl-N-(2,6-diethyl-4-hydroxyphenyl)-2,6-dimethyl-4-oxo-4H-pyran-3-carboxamide, N-(4-ethoxy-2,6-diethylphenyl)-2,6-dimethyl-4-oxo-5-phenyl-4H-pyran-3-carboxamide, 2,6-dimethyl-4-oxo-N-(4-phenoxyphenyl)-5-(3-trifluoromethylphenyl)-4H-pyran-3-carboxamide, N-(2,6-diethyl-4-nitrophenyl)-2,5,6-trimethyl-4-oxo-4H-pyran-3-carboxamide, N-(4-carboxy-2,6-diethylphenyl)-2,5,6-trimethyl-4-oxo-4H-pyran-3-carboxamide, N-(2,6-diethyl-4-methoxycarbonylphenyl)-2,5,6-trimethyl-4-oxo-4H-pyran-3-carboxamide, 6-methoxymethyl-4-oxo-N-phenyl-2-propyl-4H-pyran-3-carboxamide and 6-methoxymethyl-4-oxo-N-2-diphenyl-4H-pyran-3-carboxamide.

The following Table 1 and Table 2 show physical properties of the compounds of this invention. Table 3 shows "Evaluation" of the representative compounds of this invention.

EVALUATION TEST

A carrier was prepared by mixing 50 parts (by weight) of talc, 25 parts of bentonite, 2 parts of Solpole-9047 (Toho Chemical Co., Ltd, Japan) and 3 parts of Solpole-5039 (Toho Chemical Co., Ltd, Japan). 50 parts of a test compound and 200 parts of the carrier were mixed to obtain 20% wettable powder, followed by dispersing the powder in distilled water to make a dispersion of the defined concentrations.

Seeds of Oryza sativa L., Echinochloa crus-galli L., and Raphanus sativus L. were germinated in a laboratory dish, to which the dispersion was added. After breeding for 7 days in a thermostatic box kept at 25.degree. C. under illumination of fluorescent tubes, growth of plant was observed. In the column of "Evaluation" of Table 3, the designation 1 denotes no influence, 2 denotes 25% growth inhibition, 3 denotes 50% growth inhibition, 4 denotes 75% growth inhibition and 5 denotes 100% growth inhibition.

EXAMPLE 1

2-Ethyl-6-methyl-4-oxo-N-phenyl-4H-pyran-3-carboxamide (Compound No. 1)

A mixture of 1.91 g (10 m mol) of 3-oxo-N-phenyl-pentamide, 0.9 g (15 m mol) of N,N-dimethylhydrazine and 15 ml of toluene was stirred for 8 hours at 60.degree. C. and further heated at a more elevated temperature to distill off unreacted N,N-dimethylhydrazine and the resulted water together with about 10 ml of toluene. While refluxing the mixture, 2.10 g (25 m mol) of diketene was dropwise added to it during 5 minutes, and then heated under reflux for 2 hours. After cooling to room temperature, the precipitated crystals were separated by filtration, washed and dried to afford 0.900 g of the title compound (yield: 35%).

EXAMPLE 2

6-Methyl-4-oxo-N-phenyl-2-propyl-4H-pyran-3-carboxamide (Compound No. 2)

A mixture of 2.05 g (10 m mol) of 3-oxo-N-phenyl hexanamide (m.p. 77.0.degree..about.78.5.degree. C.), 0.9 g (15 m mol) of N,N-dimethylhydrazine and 15 ml of toluene was stirred for 8 hours at 60.degree. C. and further heated to a more elevated temperature to distill off the unreacted N,N-dimethylhydrazine and the resulted water together with about 2 ml of toluene. While refluxing, to the mixture was dropwise added a solution of 3.90 g (25 m mol) of 2-ethyl-2,6-dimethyl-4H-1,3-dioxin-4-one in 8 ml of toluene during 30 minutes. While refluxing for 2.5 hours, 3 ml of toluene was removed. After cooling to room temperature, the precipitated crystals were separated, washed and dried under vacuo to afford 1.32 g of the title compound (yield: 49%).

EXAMPLE 3

N-(2,6-Diethylphenyl)-5,6-dimethyl-4-oxo-2-propyl-4H-pyran-3-carboxamide (Compound No. 3)

A mixture of 5.22 g (20 m mol) of N-(2,6-diethylphenyl)-3-oxo-hexanamide, 2.40 g (40 m mol) of N,N-dimethylhydrazine and 40 ml of toluene was stirred for 6 hours at 60.degree. C., and further heated to a more elevated temperature to distill off the unreacted N,N-dimethylhydrazine and resulted water together with about 12 ml of toluene. After the remaining solvent in the mixture was removed under vacuo by a rotary-evaporator, 6.27 g (44 m mol) of 2,2,5,6-tetramethyl-4H-1,3-dioxin-4-one and 20 ml of mesitylene were added to the residue. While refluxing gently for 1.5 hours, the resulted acetone was removed. The solvent was removed under vacuo, and the residue was subjected to silica gel column chromatography, and the resulted residue was crystallized to afford 5.39 g of the title compound (yield: 78.9%).

EXAMPLE 4

N-(4-Chlorophenyl)-2-methyl-4-oxo-6-phenyl-4H-pyran-3-carboxamide (Compound No. 4)

A mixture of 2.12 g (10 m mol) of p-chloroacetoacetanilide, 1.07 g (10 m mol) of benzylamine and 20 ml of toluene was refluxed for 1 hour, while the resulted water together with about 12 ml of toluene were distilled off outside the reaction system. After the remaining solvent in the mixture was removed by a rotary evaporator under vacuo, 4.49 g (22 m mol) of 2,2-dimethyl-6-phenyl-4H-1,3-dioxin-4-one, 4.65 g (40 m mol) of N,N,N',N'-tetramethylethylenediamine and 20 ml of xylene were added to the residue. While further refluxing gently for 1.5 hours, the resulted acetone was removed to outside the reaction system. The mixture was cooled to precipitate the crystals. The crystals were filtered and dried to afford 2.63 g of the title compound (yield: 77.5%).

EXAMPLE 5

N-(2-Ethylphenyl)-2,5,6-trimethyl-4-oxo-4H-pyran-3-carboxamide (Compound No. 5)

A mixture of 2.21 g (10.8 m mol) of N-(2-ethylphenyl)-3-oxo-butanamide, 0.96 g (16.0 m mol) of N,N-dimethylhydrazine and 30 ml of toluene was stirred for 8 hours at 60.degree. C. and further heated to a more elevated temperature to distill off the unreacted N,N-dimethylhydrazine and the resulted water together with 12 ml of toluene. The solvent was removed under vacuo by a rotary evaporator. To the residue were added 2.10 g (14.5 m mol) of 2-methyl-3-oxo-ethylbutyrate, 10 g of molecular sieve 5A and 30 ml of xylene. After refluxing for 8 hours, 10 g of molecular sieve 5A was further added and refluxed for 7 hours. The reaction mixture was filtered and concentrated to about 10 ml and cooled to room temperature. The precipitated crystals were filtered and dried to afford 1.89 g of the title compound (yield: 62%).

EXAMPLES 6-139

Compound Nos. 6-139 were obtained by the method as described in the column "Method", and Physico-chemical data on Compounds Nos. 1-139 are shown in Tables 1 and 2.

TABLE 1__________________________________________________________________________Comp. Melting MolecularNo. R.sub.1 R.sub.2 R.sub.3 R.sub.4 R.sub.5 R.sub.6 Method point(.degree.C.) formula__________________________________________________________________________1 ethyl H H H H methyl A 154.5-156 C.sub.15 H.sub.15 NO.sub.32 propyl " " " " " C 133-134 C.sub.16 H.sub.17 NO.sub.33 " 2-C.sub.2 H.sub.5 6-C.sub.2 H.sub.5 " CH.sub.3 " C 59.5-61 C.sub.21 H.sub.27 NO.sub.34 methyl 4-Cl H " H phenyl D 220-224 C.sub.19 H.sub.14 ClNO.sub.35 " 2-C.sub.2 H.sub.5 " " CH.sub.3 methyl E 179-182 C.sub.17 H.sub.19 NO.sub.36 butyl H " " H " C 99.5-101 C.sub.17 H.sub.19 NO.sub.37 isobutyl " " " " " " 116-117 C.sub.17 H.sub.19 NO.sub.38 pentyl " " " " " " 93.5-94.5 C.sub.18 H.sub.21 NO.sub.39 heptyl " " " " " " 77-79 C.sub.20 H.sub.25 NO.sub.310 phenyl " " " " " " 222-226 C.sub.19 H.sub.15 NO.sub.311 3-methylphenyl H H H H methyl C 154.5-156.5 C.sub.20 H.sub.17 NO.sub.312 4-methylphenyl " " " " " " 211.5-215.0 C.sub.20 H.sub.17 NO.sub.313 3-chlorophenyl " " " " " " 180-181 C.sub.19 H.sub.14 ClNO.sub.314 4-chlorophenyl " " " " " " 192-192.5 C.sub.19 H.sub.14 ClNO.sub.315 3-bromophenyl " " " " " " 175-176 C.sub.19 H.sub.14 BrNO.sub.316 3-trifluoro- " " " " " " 165-166.5 C.sub.20 H.sub.14 F.sub.3 NO.sub.3 methylphenyl17 phenylmethyl " " " " " " 137-139 C.sub.20 H.sub.17 NO.sub.318 3-pyridyl " " " " " " 155-157 C.sub.18 H.sub.14 N.sub.2 O.sub.319 trifluoromethyl " " " " " " 163-165 C.sub.14 H.sub.10 F.sub.3 NO.sub.320 propyl " 2-CH.sub.3 " " " " 118.5-120.5 C.sub.17 H.sub.19 NO.sub.321 phenyl 2-CH.sub.3 H H H methyl C 135-136 C.sub.20 H.sub.17 NO.sub.322 " 2-Cl " " " " " 168-170 C.sub.19 H.sub.14 ClNO.sub.323 propyl 2-CH.sub.3 3-CH.sub.3 " " " " 133-135 C.sub.18 H.sub.21 NO.sub.324 butyl " " " " " " 82-84 C.sub.19 H.sub.23 NO.sub.325 pentyl " " " " " " 78-81 C.sub.20 H.sub.25 NO.sub.326 phenyl " " " " " " 164-166 C.sub.21 H.sub.19 NO.sub.327 " " 6-CH.sub.3 " " " " 201.5-202.5 C.sub.21 H.sub.19 NO.sub.328 propyl 2-C.sub.2 H.sub.5 6-C.sub.2 H.sub.5 " " " " 63-69.5 C.sub.20 H.sub.25 NO.sub.329 butyl " " " " " " oil C.sub.21 H.sub.27 NO.sub.330 isobutyl " " " " " " " C.sub.21 H.sub.27 NO.sub.331 pentyl 2-C.sub.2 H.sub.5 6-C.sub.2 H.sub.5 H H methyl C oil C.sub.22 H.sub.29 NO.sub.332 phenyl " " " " " " 186-189 C.sub.23 H.sub.23 NO.sub.333 propyl " " 4-Br " " " 76-77.5 C.sub.20 H.sub.24 BrNO.sub.334 methyl H H H CH.sub.3 " E 190-191 C.sub.15 H.sub.15 NO.sub.335 3-chlorophenyl " " " " " C 173.5-175 C.sub. 20 H.sub.16 ClNO.sub.336 methyl 2-CH.sub.3 3-CH.sub.3 " " " E 205.0-207.0 C.sub.17 H.sub.19 NO.sub.337 butyl " " " " " C 98-99.5 C.sub.20 H.sub.25 NO.sub.338 methyl 2-CH.sub.3 3-Cl " " " E 170-171 C.sub.16 H.sub.16 ClNO.sub.339 " 2-Cl 6-CH.sub.3 " " " " 154-157 C.sub.16 H.sub.16 ClNO.sub.340 4-methylphenyl 2-C.sub.2 H.sub.5 6-C.sub.2 H.sub.5 " H " C 181-183.5 C.sub.24 H.sub.25 NO.sub.341 methyl 2-C.sub.2 H.sub.5 6-C.sub.2 H.sub.5 H CH.sub.3 methyl E 74-75 C.sub.19 H.sub.23 NO.sub.342 ethyl " " " " " C oil C.sub.20 H.sub.25 NO.sub.343 butyl " " " " " " " C.sub.22 H.sub.29 NO.sub.344 pentyl " " " " " " " C.sub.23 H.sub.31 NO.sub.345 nonyl " " " " " E " C.sub.27 H.sub.39 NO.sub.346 phenylmethyl " " " " " " " C.sub.25 H.sub.27 NO.sub.347 phenyl " " " " " C 196.5-198 C.sub.24 H.sub.25 NO.sub.348 methyl " " " C.sub.2 H.sub.5 " E 65-68 C.sub.20 H.sub.25 NO.sub.349 " " " " ph- " " 95-96 C.sub.25 H.sub.27 NO.sub.3 CH.sub.250 " " " " (CH.sub.2).sub.4 " 115-117 C.sub.21 H.sub.25 NO.sub.351 propyl 2-C.sub.2 H.sub.5 6-C.sub.2 H.sub.5 4-Br CH.sub.3 methyl C 70-71.5 C.sub.21 H.sub.26 BrNO.sub.352 methyl H H H H tri- E 174-175 C.sub.14 H.sub.10 F.sub.3 NO.sub. 3 fluoro- methyl53 " " " " " ethyl " 137.5-138 C.sub.15 H.sub.15 NO.sub.354 " " " " " pro- " 133-134 C.sub.16 H.sub.17 NO.sub.3 pyl55 " " " " " phenyl " 165-167 C.sub.19 H.sub.15 NO.sub.356 ethyl " " " " ethyl " 114.5-116 C.sub.16 H.sub.17 NO.sub.357 propyl " " " " pro- " 103.5-105 C.sub.18 H.sub.21 NO.sub.3 pyl58 " 2-CH.sub.3 " " " " " oil C.sub.19 H.sub.23 NO.sub.359 methyl 2-C.sub.2 H.sub.5 6-C.sub.2 H.sub.5 " " ethyl " " C.sub.19 H.sub.23 NO.sub.360 " " " " " pro- " 93-94 C.sub.20 H.sub.25 NO.sub.3 pyl61 methyl 2-C.sub.2 H.sub.5 6-C.sub.2 H.sub.5 H H butyl E 84-85 C.sub.21 H.sub.27 NO.sub.362 " " " " " tri- " 140-141 C.sub.18 H.sub.18 F.sub.3 NO.sub.3 fluoro- methyl63 " " " " " phenyl " 114-118 C.sub.23 H.sub.23 NO.sub.364 ethyl " " " " ethyl " oil C.sub.20 H.sub.25 NO.sub.365 propyl " " " " " " " C.sub.21 H.sub.27 NO.sub.366 " " " " C.sub.2 H.sub.5 methyl C " C.sub.22 H.sub.29 NO.sub.367 " " " " H phenyl E 105-108 C.sub.25 H.sub.27 NO.sub.368 ##STR10## H H H " methyl C 220.5-221 C.sub.18 H.sub.14 N.sub.2 O.sub.469 CH.sub.3 2-C.sub.2 H.sub.5 6-C.sub.2 H.sub.5 4-Br CH.sub.3 CH.sub.3 " 137-139.5 C.sub.19 H.sub.22 BrNO.sub.370 nC.sub.4 H.sub.9 " " " H " " 69-72.5 C.sub.21 H.sub.26 BrNO.sub.371 1-bromobutyl 2-C.sub.2 H.sub.5 6-C.sub.2 H.sub.5 H H CH.sub.3 C C.sub.21 H.sub.26 BrNO.sub.372 " " " 4-Br " " " C.sub.21 H.sub.25 Br.sub.2 NO.sub.373 nC.sub.3 H.sub.7 2-CHBrCH.sub.3 " H CH.sub.3 " " C.sub.21 H.sub.26 BrNO.sub.374 nC.sub.4 H.sub.9 " " " " " " C.sub.22 H.sub.28 BrNO.sub.375 " 2-C.sub.2 H.sub.5 " 4-Br " " " 82.5-84 C.sub.22 H.sub.28 BrNO.sub.376 3-nitrophenyl H H H H " " 181.5-183 C.sub.19 H.sub.14 N.sub.2 O.sub.577 3-chlorophenyl 2-CH.sub.3 " " " " " 145-145.5 C.sub.20 H.sub.16 ClNO.sub.378 " 2-Cl " " " " " 176-177 C.sub.19 H.sub.13 Cl.sub.2 NO.sub.379 3-chlorophenyl 3-Cl " " " " " 123.5-125 C.sub.19 H.sub.13 Cl.sub.2 NO.sub.380 " 3-CF.sub.3 " " " " " C.sub.20 H.sub.13 ClF.sub.3 NO.sub.381 3-chlorophenyl 3-Br H H H CH.sub.3 C 140-141 C.sub.19 H.sub.13 BrClNO.sub.382 " 4-CH.sub.3 " " " " " 183.5-184 C.sub.20 H.sub.16 ClNO.sub.383 " 4-Cl " " " " " 177-178 C.sub.19 H.sub.13 Cl.sub.2 NO.sub.384 " 4-CF.sub.3 " " " " " 179-181 C.sub.20 H.sub.13 ClF.sub.3 NO.sub.385 " 2-CH.sub.3 3-CH.sub.3 " " " " 151.5-153 C.sub.21 H.sub.18 ClNO.sub.386 " 2-C.sub.2 H.sub.5 6-C.sub.2 H.sub.5 " " " " 179.5-181.5 C.sub.23 H.sub.22 ClNO.sub.387 3-trifluoro- 4-F H " " " " 191-197 C.sub.20 H.sub.13 F.sub.4 NO.sub.3 methylphenyl88 3-chlorophenyl H " " " C.sub.2 H.sub.5 " 120-121 C.sub.20 H.sub.16 ClNO.sub.389 2-methoxymethyl 2-C.sub.2 H.sub.5 6-C.sub.2 H.sub.5 4-Br " methyl D 97-98.5 C.sub.19 H.sub.22 NO.sub.490 4-fluorophenyl H H H " " " 202.5-206.5 C.sub.19 H.sub.14 FNO.sub.391 4-fluorophenyl 3-CF.sub.3 H H H methyl D 178-179.5 C.sub.20 H.sub.13 F.sub.4 NO.sub.392 butyl 2-C.sub.2 H.sub.5 6-C.sub.2 H.sub.5 4-Br CH.sub.3 ethyl " C.sub.23 H.sub.30 BrNO.sub.393 " " " " C.sub.2 H.sub.5 methyl " C.sub.23 H.sub.30 BrNO.sub.394 3-chlorophenyl 2-F 4-F H H " D 72.5-73.0 C.sub.19 H.sub.12 ClF.sub.2 NO.sub.395 2-methoxymethyl 2-C.sub.2 H.sub.5 6-C.sub.2 H.sub.5 4-Br CH.sub.3 methyl D 97-100 C.sub.20 H.sub.24 BrNO.sub.496 " " " H " " " C.sub.20 H.sub.25 NO.sub.497 " " " " H " " C.sub.19 H.sub.23 NO.sub.498 propyl 2-C.sub.2 H.sub.5 6-C.sub.2 H.sub.5 4-C.sub.2 H.sub.5 " " " C.sub.22 H.sub.29 NO.sub.399 " " " " CH.sub.3 " " C.sub.23 H.sub.31 NO.sub.3100 " " " 4-Br " ethyl " C.sub.22 H.sub.28 BrNO.sub.3101 propyl 2-C.sub.2 H.sub.5 6-C.sub.2 H.sub.5 4-I H methyl D 76-76.5 C.sub.20 H.sub.24 INO.sub.3102 " " " 4-Br C.sub.2 H.sub.5 " " C.sub.22 H.sub.28 BrNO.sub.3103 " " " 4-I CH.sub.3 " " 95.5-99 C.sub.21 H.sub.26 INO.sub.3104 trifluoromethyl " " H H " " 182-183 C.sub.18 H.sub.18 F.sub.3 NO.sub.3105 propyl " " 4-OCH.sub.3 " " " C.sub.21 H.sub.27 NO.sub.4106 " " " H (CH.sub.2).sub.4 "107 " " " 4-OCH.sub.3 CH.sub.3 methyl " C.sub.22 H.sub.29 NO.sub.4108 " " " 4-NO.sub.2 H " " C.sub.20 H.sub.24 N.sub.2 O.sub.5109 propyl " " " CH.sub.3 " " C.sub.22 H.sub.26 N.sub.2 O.sub.5110 methyl " " H nC.sub.3 H.sub.7 " " C.sub.21 H.sub.27 NO.sub.3111 propyl 2-C.sub.2 H.sub.5 6-C.sub.2 H.sub.5 4-oph H methyl D C.sub.26 H.sub.29 NO.sub.4112 " " " " CH.sub.3 " " C.sub.27 H.sub.31 NO.sub.4113 methyl " " 4-Br nC.sub.3 H.sub.7 " " 129.5-131.5 C.sub.21 H.sub.26 BrNO.sub.3114 " " " H nC.sub.4 H.sub.9 " " C.sub.22 H.sub.29 NO.sub.3115 " 2-CH.sub.3 3-CH.sub.3 " C.sub.2 H.sub.5 " " 193.5-196.0 C.sub.18 H.sub.21 NO.sub.3118 " " " 4-Br nC.sub.3 H.sub.7 " " 80.5-82.5 C.sub.23 H.sub.30 BrNO.sub.3119 methyl " " H iso- " " C.sub.22 H.sub.29 NO.sub.3 C.sub.4 H.sub.9120 propyl " " 4-Br nC.sub.4 H.sub.9 " " C.sub.24 H.sub.32 BrNO.sub.3121 propyl 2-C.sub.2 H.sub.5 6-C.sub.2 H.sub.5 4-Br iso- methyl D 72-76 C.sub.24 H.sub.32 BrNO.sub.3 C.sub.4 H.sub.9122 " " " 4-NH.sub.2 CH.sub.3 " " C.sub.21 H.sub.28 N.sub.2 O.sub.3123 " " " 4-OC.sub.2 H.sub.5 H " " C.sub.22 H.sub.29 NO.sub.4124 " " " " CH.sub.3 " " 82-84 C.sub.23 H.sub.31 NO.sub.4125 " " " 4-nC.sub.3 H.sub.7 " " " C.sub.24 H.sub.33 NO.sub.3126 methyl " " H iso- " " C.sub.23 H.sub.31 NO.sub.3 C.sub.5 H.sub.11127 propyl " " 4-Cl CH.sub.3 " " 54.5-57.0 C.sub.21 H.sub.26 ClNO.sub.3128 " " " " H " " C.sub.20 H.sub.24 ClNO.sub.3129 " " " 4-CH.sub.3 CH.sub.3 " " 96-98 C.sub.22 H.sub.29 NO.sub.3130 " " " " H " " C.sub.21 H.sub.27 NO.sub.3131 propyl 2-C.sub.2 H.sub.5 6-C.sub.2 H.sub.5 4-COOH CH.sub.3 methyl D C.sub.22 H.sub.27 NO.sub.5132 " " " " H " " C.sub.21 H.sub.25 NO.sub.5133 " " " 4-CN CH.sub.3 " " C.sub.22 H.sub.26 N.sub.2 O.sub.3134 " " " " H " " 67-69 C.sub.21 H.sub.24 N.sub.2 O.sub.3135 ethyl " " 4-Br CH.sub.3 " " 109-112 C.sub.20 H.sub.24 BrNO.sub.3136 propyl " " " (CH.sub.2).sub.4 E 101-102 C.sub.23 H.sub.28 BrNO.sub.3137 " " " " (CH.sub.2).sub.3 " 90-92 C.sub.22 H.sub.26 BrNO.sub.3138 " " " 4-COOEt H methyl D C.sub.23 H.sub.29 NO.sub.5139 " " " " CH.sub.3 " " C.sub.24 H.sub.31 NO.sub.5__________________________________________________________________________ TABLE 2__________________________________________________________________________Compound IR NMRNo. .nu. value (cm.sup.-1) Method Chemical shift .delta. value Solvent__________________________________________________________________________ 1.31(t,3H), 2.27(s,3H), 3.28(q,2H), 6.18(s,1H),1 1650, 1700 KBr 6.90-7.70(m,5H), and CDCl.sub.3 11.90(br,1H) 1.02(t,3H), 1.75(six,2H), 2.38(s,3H), 3.23(t,2H),2 1657, 1697 " 6.18(s,1H), 6.90-7.70(m,5H), " and 11.92(br,1H) 0.98(t,3H), 1.16(t,6H), 1.75(six,2H), 2.00(s,3H),3 1650, 1680 " 2.32(s,3H), 2.62(q,4H), " 3.20(t,2H), 7.04(s,3H), and 11.10(br,1H) 2.97(s,3H), 6.38(s,1H), 7.10-7.83(m,9H), and4 1638, 1685 " 12.10(br,1H) " 1.26(t,3H), 1.95(s,3H), 2.26(s,3H), 2.75(q,2H),5 1650, 1692 " 2.79(s,3H), 6.70-8.20(m,4H), " and 12.20(br,1H) 0.70-2.00(m,7H), 2.28(s,3H), 3.27(t,2H), 6.19(s,1H),6 1657, 1707 KBr 6.90-7.70(m,5H), and CDCl.sub.3 11.90(br,1H) 0,97(d,6H), 2.27(s,3H), 2.30(m,1H), 3.18(d,2H),7 1620, 1660, " 6.20(s,1H), 6.95- 7.70(m,5H), " 1690 and 11.87(br,1H) 0.70-2.00(m,9H), 2.24(s,3H), 3.27(t,2H), 6.16(s,1H),8 1655, 1705 " 6.90-7.70(m,5H), and " 11.86(br,1H) 0.70-2.00(m,13H), 2.29(s,3H), 3.30(t,2H), 6.23(s,1H),9 1653, 1705 " 7.00-7.77(m,5H), and " 11.87(br,1H) 2.36(s,3H), 6.28(s,1H), 6.80-7.80(m,10H),10 1607, 1655, " and 10.23(br,1H) DMSO--d.sup.6 1675 2.30(s,3H), 2.36(s,3H), 6.25(s,1H), 6.90-7.60(m,9H),11 1603, 1650, KBr and 10.95(br,1H) CDCl.sub.3 1673 2.30(s,3H), 2.34(s,3H), 6.24(s,1H), 6.90-7.60(m,9H),12 1657, 1680 " and 10.92(br,1H) " 2.34(s,3H), 6.33(s,1H), 7.00-7.67(m,9H),13 1627, 1673 " and 11.14(br,1H) " 2.30(s,3H), 6.26(s,1H), 6.90-7.60(m,9H),14 1655, 1680 " and 11.12(br,1H) " 2.35(s,3H), 6.32(s,1H), 6.95-7.67(m,9H),15 1605, 1625, " and 11.19(br,1H) " 1670 2.33(s,3H), 6.33(s,1H), 6.90-7.80(m,9H),16 1650, 1675 KBr and 11.23(br,1H) CDCl.sub.3 1695 2.20(s,3H), 4.66(s,2H), 6.13(s,1H), 6.95-7.70(m,10H),17 1653, 1703 " and 11.92(br,1H) " 2.33(s,3H), 6.31(s,1H), 6.90-8.70(m,9H),18 1617, 1650, " and 11.36(br,1H) " 1690 2.33(s,3H), 6.27(s,1H), 6.85-7.65(m,5H),19 1600, 1655, " and 9.42(br,1H) " 1705 1.00(t,3H), 1.75(six,2H), 2.28(s,3H), 2.36(s,3H),20 1620, 1657, " 3.23(t,2H), 6.16(s,1H), " 1697 6.80-8.10(m,4H), and 11.76(br,1H) 2.32(s,3H), 2.36(s,3H), 6.32(s,1H), 6.85-8.10(m,9H),21 1620, 1660, KBr and 10.90(br,1H) CDCl.sub.3 1707 2.34(s,3H), 6.31(s,1H), 6.80-8.32(m,9H),22 1655, 1700 " and 10.23(br,1H) " 1.02(t,3H), 1.68(six,2H), 2.25(s,3H), 2.29(s,6H),23 1620, 1660, " 3.26(t,2H), 6.21(s,1H), " 1695 6.85-7.80(m,3H), and 11.60(br,1H) 0.75-2.00(m,7H), 2.23(s,3H), 2.27(s,6H), 3.27(t,3H),24 1620, 1660, " 6.19(s,1H), 6.80-7.83(m,3H), " 1700 and 11.60(br,1H) 0.70-2.00(m,9H), 2.26(s,3H), 2.30(s,6H), 3.32(t,2H),25 1620, 1660, " 6.23(s,1H), 6.85-7.83(m,3H), " 1697 and 11.64(br,1H) 2.24(s,6H), 2.31(s,3H), 6.23(s,1H), 6.70-7.65(m,8H),26 1657, 1697 KBr and 10.47(br,1H) CDCl.sub.3 2.24(s,6H), 2.36(s,3H), 6.34(s,1H), 7.00-7.67(m,8H),27 1603, 1623, " and 9.98(br,1H) " 1667 0.98(t,3H), 1.17(t,6H), 1.75(six,2H), 2.28(s,3H),28 1627, 1640, " 2.63(q,4H), 3.24(t,2H), " 1670 6.24(s,1H), 7.06(s,3H), and 10.98(br,1H) 0.60-2.00(m,7H), 1.17(t,6H), 2.28(s,3H), 2.60(q,4H),29 1660, 1687 neat 3.23(t,2H), 6.20(s,1H), " 7.05(s,3H), and 10.80(br,1H) 0.97(d,6H), 1.19(t,6H), 2.30(m,1H), 2.32(s,3H),30 1600, 1657, " 2.64(q,4H), 3.22(d,2H), " 1685 6.29(s,1H), 7.12(s,3H), and 11.00(br,1H) 0.60-2.00(m,9H), 1.20(t,6H), 2.32(s,3H), 2.63(q,4H),31 1610, 1660, neat 3.28(t,2H), 6.27(s,1H), CDCl.sub.3 1687 7.12(s,3H), and 11.00(br,1H) 1.16(t,6H), 2.32(s,3H), 2.58(q,4H), 6.27(s,1H),32 1603, 1623, KBr 7.00-7.50(m,8H), " 1647, 1663 and 9.87(br,1H) 0.98(t,3H), 1.16(t,6H), 1.75(six,2H), 2.30(s,3H),33 1640, 1683 " 2.67(q,4H), 3.20(t,2H), " 6.23(s,1H), 7.18(s,2H), and 11.03(br,1H) 1.96(s,3H), 2.32(s,3H), CDCl.sub.3 + 2.80(s,3H), 6.90-7.70(m,5H),34 1647, 1683 " and 12.17(br,1H) DMSO--d.sup.6 2.06(s,3H), 2.39(s,3H), 7.00-7.10(m,9H),35 1620, 1645, " and 11.40(br,1H) CDCl.sub.3 1695 1.96(s,3H), 2.26(s,9H), 2.78(s,3H), 6.80-7.80(m,3H),36 1610, 1653, KBr and 11.96(br,1H) CDCl.sub.3 1690 0.65-2.00(m,7H), 1.98(s,3H), 2.26(s,9H), 3.27(t,2H),37 1615, 1645, " 6.70-7.80(m,3H), " 1693 and 11.80(br,1H) 1.94(s,3H), 2.28(s,3H), 2.41(s,3H), 2.78(s,3H),38 1660, 1700 " 7.90-8.00(m,3H), " and 12.15(br,1H) 1.98(s,3H), 2.27(s,3H), 2.30(s,3H), 2.76(s,3H),39 1653, 1677 " 6.90-7.30(m,3H), " and 11.60(br,1H) 1.16(t,6H), 2.30(s,3H), 1610, 1625, 2.33(s,3H), 2.59(q,4H),40 1647, 1660, " 6.25(s,1H), 6.90-7.50(m,7H), " 1680 and 9.90(br,1H) 1.20(t,6H), 2.00(s,3H), 2.32(s,3H), 2.62(q,4H),41 1653, 1680 KBr 2.80(s,3H), 7.10(s,3H), CDCl.sub.3 and 11.33(br,1H) 1.14(t,6H), 1.28(t,3H), 1.98(s,3H), 2.31(s,3H),42 1613, 1652, neat 2.60(q,4H), 3.12(q,2H), " 1680 7.03(s,3H), and 11.18(br,1H) 0.80-2.00(m,7H), 1.17(t,6H), 2.00(s,3H), 2.32(s,3H),43 1655, 1680 " 2.61(q,4H), 3.20(t,2H), " 7.04(s,3H), and 11.13(br,1H) 0.80-2.00(m,9H), 1.16(t,6H), 2.00(s,3H), 2.32(s,3H),44 1657, 1680 " 2.62(q,4H), 3.20(t,2H), " 7.03(s,3H), and 11.12(br,1H)45 1655, 1683 " --46 1657, 1683 neat -- 1.14(t,6H), 2.05(s,3H), 2.36(s,3H), 2.58(q,4H),47 1620, 1660 KBr 7.00-7.60(m,8H), CDCl.sub.3 and 10.10(br,1H) 1.04(t,3H), 1.16(t,6H), 2.32(s,3H), 2.47(q,2H),48 1643, 1673 " 2.63(q,4H), 2.76(s,3H), " 7.03(s,3H), and 11.37(br,1H) 1.13(t,6H), 2.25(s,3H), 2.60(q,4H), 2.73(s,3H),49 1640, 1717 " 3.81(s,2H), 7.05(s,3H), " 7.15(s,5H), and 11.25(br,1H) 1.16(t,6H), 1.40-2.85(m,8H), 2.59(q,4H), 2.76(s,3H),50 1655, 1677 " 7.01(s,3H), and " 11.23(br,1H) 0.98(t,3H), 1.19(t,6H), 1.75(six,2H), 2.00(s,3H),51 1637, 1667 KBr 2.33(s,3H), 2.60(q,4H), CDCl.sub.3 3.20(t,2H), 7.20(s,2H), and 11.30(br,1H) 2.86(s,3H), 6.73(s,1H), 6.90-7.70(m,5H),52 1695 " and 11.43(br,1H) " 1.23(t,3H), 2.57(q,2H), 2.82(s,3H), 6.20(s,1H),53 1657, 1700 " 6.90-7.70(m,5H), " and 11.95(br,1H) 0.97(t,3H), 1.67(six,2H), 2.47(t,2H), 2.80(s,3H),54 1643, 1687 " 6.18(s,1H), 6.90-7.70(m,5H), " and 12.07(br,1H) 2.94(s,3H), 6.80(s,1H), 6.90-7.70(m,10H), and55 1600, 1620, " 11.95(br,1H) " 1640, 1690 1.21(t,3H), 1.30(t,3H), 2.54(q,2H), 3.27(q,2H),56 1652, 1698 KBr 6.17(s,1H), 6.70-7.90(m,5H), CDCl.sub.3 12.02(br,1H) 0.96(t,3H), 1.01(t,3H), 1.67(six,2H), 1.80(six,2H),57 1620, 1647, " 2.48(t,2H), 3.26(t,2H), " 1690 6.18(s,1H), 6.90-7.75(m,5H), and 12.02(br,1H)58 1655, 1690 neat -- 1.13(t,6H), 1.23(t,3H), 2.57(q,2H), 2.61(q,4H),59 1652, 1685 " 2.75(s,3H), 6.23(s,1H), CDCl.sub.3 7.03(s,3H), and 11.03(br,1H) 0.96(t,3H), 1.20(t,6H), 1.66(six,2H), 2.47(t,2H),60 1650, 1675 KBr 2.63(q,4H), 2.80(s,3H), " 6.21(s,1H), 7.07(s,3H), and 11.16(br,1H) 0.70-2.00(m,7H), 1.19(t,6H), 2.50(t,2H), 2.63(q,4H),61 1650, 1673 KBr 2.80(s,3H), 6.20(s,1H), CDCl.sub.3 7.07(s,3H), and 11.20(br,1H) 1.15(t,6H), 2.57(q,4H), 2.84(s,3H), 6.77(s,1H),62 1607, 1640, " 7.04(s,3H), and " 1650, 1675 10.25(br,1H) 1.19(t,6H), 2.63(q,4H), 2.92(s,3H), 6.82(s,1H),63 1610, 1640, " 6.90-8.10(m,8H), " 1673 and 11.12(br,1H) 1.19(t,6H), 1.27(t,3H), 1.30(t,3H), 2.45(q,2H),64 1605, 1647, neat 2.61(q,4H), 3.24(q,2H), " 1680 6.20(s,1H), 7.04(s,3H), and 11.15(br,1H) 0.97(t,3H), 1.18(t,6H), 1.27(t,3H), 1.75(six,2H),65 1653, 1685 " 2.60(q,2H), 2.62(q,4H), " 3.21(t,2H), 6.21(s,1H), 7.05(s,3H), and 10.83(br,1H) 0.96(t,3H), 1.09(t,3H), 1.16(t,6H), 1.73(six,2H),66 1650, 1680 neat 2.31(s,3H), 2.49(q,2H), CDCl.sub.3 2.61(q,4H), 3.17(t,2H), 7.04(s,3H), and 11.14(br,1H) 1.07(t,3H), 1.20(t,6H), 1.85(six,2H), 2.63(q,4H),67 1615, 1643, KBr 3.36(t,2H), 6.81(s,1H), " 1680 7.05-7.85(m,8H), and 11.23(br,1H) 2.40(s,3H), 6.36(s,1H), CDCl.sub.3 6.95-8.40(m,9H), +68 1615, 1657, " and 10.90(br,1H) DMSO-d.sup.6 1707__________________________________________________________________________Compound IR NMRNo. .nu. value (cm.sup.-1) Method Chemical shift .nu. value Solvent__________________________________________________________________________ 1.16(t,6H), 1.99(s,3H), 2.33(s,3H),69 1657, 1680 KBr 2.57(q,4H), 2.78(s,3H), 7.18(s,2H), and CDCl.sub.3 11.25(br,1H) 0.60-2.00(m,7H), 1.17(t,6H), 2.31(s,3H),70 1637, 1685 " 2.58(q,4H), 3.22(t,2H), 6.24(s,1H), " 7.20(s,2H), and 11.00(br,1H) 0.70-2.20(m,7H), 1.18(t,6H), 2.36(s,3H),71 1610, 1680 neat 2.60(q,4H), 6.26(s,1H), 6.69(t,1H), " 7.07(s,3H), and 10.83(br,1H)72 1610, 1657, " 0.70-2.20(m,5H), 1.16(t,6H), 2.35(s,3H), 1680 2.58(q,4H), 6.28(s,1H), 6.68(t,1H), " 7.20(s,2H), and 10.75(br,1H) 0.70-2.20(m,7H), 1.17(t,3H), 1.62(d,3H),73 1620, 1660 " 1.92(s,3H), 2.25(s,3H), 2.50-3.10(m,4H), " 5.47(q,1H), 6.90-7.30(m,3H), and 11.93(br,1H) 0.60-2.20(m,7H), 1.18(t,3H), 1.68(d,3H),74 1610, 1665 neat 1.93(s,3H), 2.28(s,3H), 2.50-3.10(m,4H), CDCl.sub.3 5.44(q,1H), 6.90-7.30(m,3H), and 12.00 (br,1H) 0.70-2.00(m,7H), 1.17(t,6H), 2.00(s,3H),75 1655, 1683 KBr 2.33(s,3H), 2.58(q,4H), 3.20(d,2H), " 7.18(s,2H), and 11.20(br,1H)76 1657, 1680, " 2.34(s,3H), 6.38(s,1H), 6.90-7.45(m,9H), " 1695 and 11.38(br,1H)77 1660, 1700 " 2.36(s,3H), 2.40(s,3H), 6.38(s,1H), " 6.90-8.05(m,8H), and 11.05(br,1H)78 1613, 1660, " 2.31(s,3H), 6.28(s,1H), 6.70-8.23(m,8H), " 1700 and 11.60(br,1H) 2.33(s,3H), 6.30(s,1H), 6.90-7.70(m,8H),79 1627, 1657, KBr and 11.37(br,1H) CDCl.sub.3 1670 2.33(s,3H), 6.32(s,1H), 7.15-7.90(m,8H),80 1600, 1657, neat and 11.50(br,1H) " 1690 2.33(s,3H), 6.30(s,1H), 7.00-7.80(m,8H), "81 1660, 1695 KBr and 11.37(br,1H) 2.25(s,3H), 2.29(s,3H), 6.24(s,1H),82 1615, 1633, " 6.85-7.50(m,8H), and 10.80(br,1H) " 1673 2.33(s,3H), 6.30(s,1H), 7.00-7.60(m,8H),83 1617, 1625, " and 11.30(br,1H) " 1660, 1670 2.36(s,3H), 6.33(s,1H), 7.20-7.80(m,8H),84 1615, 1657, KBr and 11.57(br,1H) CDCl.sub.3 1700 2.28(s,6H), 2.33(s,3H), 6.30(s,1H),85 1623, 1660, " 6.80-7.70(m,7H), and 10.70(br,1H) " 1707 1.16(t,6H), 2.31(s,3H), 2.59(q,4H),86 1645, 1663 " 6.30(s,1H), 6.90-7.50(m,7H), and " 10.05(br,1H)87 1630, 1650, " 2.36(s,3H), 6.35(s,1H), 6.70-7.80(m,8H), " 1665 and 11.34(br,1H)88 1627, 1653, " 1.25(t,3H), 2.61(q,2H), 6.29(s,1H), " 1697 6.80-7.65(m,9H), and 10.97(br, 1H)__________________________________________________________________________Compound IR NMRNo. .nu. value (cm.sup.-1) Method Chemical shift .delta. value Solvent__________________________________________________________________________ 1.17(t,6H), 2.40(s,3H),89 2.60(q,4H), 3.46(s,3H), CDCl.sub.3 5.00(s,2H), 6.30(s,1H) 7.23(s,2H), and 11.10(br,1H) 2.36(s,3H), 6.26(s,1H), CDCl.sub.3 +90 1610, 1620, 1663 KBr 6.80-7.80(m,9H) and 10.47(br,1H) DMSO--d.sup. 6 2.33(s,3H), 6.28(s,1H),91 1610, 1620, 1663 " 6.87-7.80(m,8H) and CDCl.sub.3 11.52(br,1H) 1.18(t,6H), 1.32(t,3H),92 1653, 1683 neat 0.70-2.10(m,7H), 2.03(s,3H), " 2.62(q,4H), 2.73(q,2H), 3.28(t,2H), 7.24(s,2H) and 11.25(br,1H) 0.70-2.10(m,7H), 1.12(t,3H),93 1630, 1640, 1663 " 1.17(t,6H), 2.34(s,3H), " 2.50(q,2H), 2.62(q,4H), 3.23(t,2H), 7.23(s,2H) and 11.20(br,1H)94 1613, 1660, 1697 KBr 1.17(t,6H), 2.03(s,3H),95 1620, 1650, 1673 " 2.42(s,3H), 2.60(q,4H), CDCl.sub.3 3.43(s,3H), 5.00(s,2H), 7.23(s,2H) and 11.13(br,1H) 1.17(t,6H), 2.02(s,3H),96 2.40(s,3H), 2.60(q,4H), " 3.43(s,3H), 4.98(s,2H), 7.08(s,3H) and 11.14(br,1H) 1.19(t,6H), 2.39(s,3H),97 2.61(q,4H), 3.47(s,3H), " 5.02(s,2H), 6.31(s,1H), 7.11(s,3H) and 10.87(br,1H) 1.00(t,3H), 1.17(t,6H),98 1607, 1660, 1690 neat 1.22(t,3H), 1.75(six,2H), " 2.30(s,3H), 2.59(q,6H), 3.21(t,2H), 6.21(s,1H), 6.89(s,2H), and 10.73(br,1H) 0.99(t,3H), 1.17(t,6H), 1.23(t,3H), 1.77(six,2H),99 1655, 1680 neat 2.02(s,3H), 2.34(s,3H), CDCl.sub.3 2.60(q,6H), 3.20(t,2H), 6.92(s,2H) and 11.03(br,1H) 0.70-2.00(m,5H), 0.99(t,3H), 1.17(t,6H), 2.02(s,3H),100 1653, 1683 " 2.55(q,2H), 2.59(q,4H), " 3.20(t,2H), 7.21(s,2H), 11.24(br,1H) 0.99(t,3H), 1.17(t,6H), 1.75(six,2H), 2.31(s,3H)101 1640, 1685 KBr 2.55 (q,4H), 3.20(t,2H), " 6.23(s,1H), 7.38(s,2H) and 11.07(br,1H) 0.98(t,3H), 1.09(t,3H), 1.15(t,6H), 1.74(six,2H),102 1640, 1660, 1685 neat 2.32(s,3H), 2.45(q,2H), " 2.57(q,4H), 3.16(t,2H), 7.17(s,2H) and 11.00(br,1H) 0.96(t,3H), 1.14(t,6H),103 1637, 1640, 1670 KBr 1.73(six,2H), 2.00(s,3H), " 2.33(s,3H), 2.55(q,4H), 3.18(t,2H), 7.39(s,2H) and 11.23(br,1H) CHCl.sub.3 1.18(t,6H), 2.40(s,3H),104 1657 Soln. 2.64(q,4H), 6.32(s,1H), CDCl.sub.3 7.08(m,3H) and 8.74(br,1H) 0.98(t,3H), 1.26(t,6H),105 1.75(six,2H), 2.30(s,3H), " 2.57(q,4H), 3.21(t,2H), 3.76(s,3H), 6.23(s,1H), 6.61(s,2H) and 10.75(br,1H) 0.99(t,3H), 1.17(t,6H), 1.40-2.00(m,6H), 2.35-2.55106 (m,4H), 2.63(q,4H), 3.21(t,2H), " 7.10(t,3H) and 11.17(br,1H) 0.98(t,3H), 1.17(t,6H),107 1603, 1653, 1690 neat 1.73(six,2H), 2.00(s,3H), " 2.32(s,3H), 2.58(q,4H), 3.20(t,2H), 3.76(s,3H), 6.62(s,2H) and 10.98(br,1H) 1.02(t,3H), 1.24(t,6H), 1.78(six,2H), 2.36(s,3H),108 2.73(q,4H), 3.26(t,2H), " 6.33(s,1H), 8.00(s,2H) and 11.61(br,1H) 1.00(t,3H), 1.23(t,6H), 1.76(six,2H), 2.02(s,3H),109 2.37(s,3H), 2.73(q,4H), CDCl.sub.3 3.23(t,2H), 7.97(s,2H) and 11.78(br,1H) 0.98(t,3H), 1.19(t,6H), 1.55(six,2H), 2.30(s,3H),110 1655, 1687 neat 2.45(t,2H), 2.63(q,4H), " 2.76(s,3H), 7.09(s,3H) and 11.30(br,1H) 1.01(t,3H), 1.14(t,6H), 1.78(six,2H), 2.28(s,3H),111 2.59(q,4H), 3.25(t,2H), " 6.26(s,1H), 6.85(s,2H), 6.80- 7.50(m,5H) and 11.02(br,1H) 0.98(t,3H), 1.14(t,6H),112 1659, 1683 neat 1.75(six,2H), 2.00(s,3H), " 2.31(s,3H), 2.59(q,4H), 3.21(t,2H), 6.85(s,2H), 6.80- 7.50(m,5H) and 11.18(br,1H) 0.98(t,3H), 1.19(t,6H),113 1653, 1683 KBr 1.53(six,2H), 2.33(s,3H), " 2.47(t,2H), 2.60(q,4H), 2.77(s,3H), 7.23(s,2H) and 11.34(br,1H) 0.70-1.70(m,7H), 1.16(t,6H),114 1653, 1683 neat 2.30(s,3H), 2.45(t,2H), CDCl.sub.3 2.63(q,4H), 2.75(s,3H), 7.08(s,3H) and 11.27(br,1H)115 1655, 1695 KBr 0.98(t,6H), 1.16(t,6H),118 1645, 1677 KBr 1.40-2.10(m,4H), 2.33(s,3H), " 2.47(t,2H), 2.60(q,4H),, 3.20(t,2H), 7.20(s,2H) and 11.21(br,1H) 0.95(d,6H), 1.18(t,6H), 1.40-2.10(m,1H), 2.28(s,3H),119 1653, 1685 neat 2.50(d,2H), 2.63(q,4H), CDCl.sub.3 2.75(s,3H), 7.08(s,3H,) and 11.30(br.1H) 0.70-2.10(m,12H), 1.16(t,6H), 2.32(s,3H), 2.40(t,2H),120 1650, 1680 " 2.60(q,4H), 3.20(t,2H), " 7.20(s,2H), and 11.31(br,1H) 0.94(d,6H), 0.98(t,3H), 1.17(t,6H), 1.35-2.10(m,3H),121 1650, 1680 KBr 2.33(s,3H), 2.45(d,2H), " 2.58(q,4H), 3.20(t,2H), 7.20(s,2H), and 11.30(br,1H) 0.97(t,3H), 1.13(t,6H), 1.75(six,2H), 1.99(s,3H),122 2.32(s,3H), 2.52(q,4H), " 3.19(t,2H), 3.61(br,2H), 6.42(s,2H), and 10.67(br,1H) 0.98(t,3H), 1.16(t,6H), 1.37(t,3H), 1.75(six,2H),123 1603, 1660, neat 2.28(s,3H), 2.55(q,4H), " 1683 3.18(t,2H), 3.97(q,2H), 6.18(s,1H), 6.58(s,2H), and 10.57(br,1H) 0.98(t,3H), 1.18(t,6H), 1.39(t,3H), 1.75(six,2H),124 1650, 1680 KBr 2.00(s,3H), 2.58(q,4H), CDCl.sub.3 3.18(t,2H), 3.98(q,2H), 6.60(s,2H), 10.76(br,1H), and 2.33(s,3H) 0.98(t,6H), 1.17(t,6H), 1.40-2.10(m,4H), 2.00(s,3H),125 2.34(s,3H), 2.60(q,4H), " 3.20(t,2H), 6.88(s,2H), 11.05(br,1H), and 2.53(t,2H) 0.70-2.00(m,3H), 0.95(d,6H), 1.17(t,6H), 2.30(s,3H),126 2.41(t,2H), 2.60(q,4H), " 2.76(s,3H), 7.06(s,3H), and 11.27(br,1H) 0.98(t,3H), 1.17(t,6H), 1.75(six,2H), 2.00(s,3H),127 1657, 1673 KBr 2.34(s,3H), 2.60(q,4H), " 3.21(t,2H), 7.07(s,2H), and 11.23(br,1H), 0.98(t,3H), 1.17(t,6H), 1.75(six,2H), 2.33(s,3H),128 1657, 1683 neat 2.59(q,4H), 3.21(t,2H), " 6.20(s,1H), 7.08(s,2H), and 11.20(br,1H) 0.98(t,3H), 1.16(t,6H), 1.73(six,2H), 2.00(s,3H),129 1655, 1683 KBr 2.31(s,3H), 2.57(q,4H), CDCl.sub.3 3.20(t,2H), 6.86(s,2H), 11.00(br,1H), and 2.27(s,3H) 0.98(t,3H), 1.17(t,6H), 1.75(six,2H), 2.33(s,3H),130 2.27(s,3H), 2.57(q,4H), " 3.20(t,2H), 6.22(s,1H), 11.03(br,1H), and 6.87(s,2H)131132 0.99(t,3H), 1.19(t,6H), 1.73(six,2H), 2.02(s,3H),133 1655, 1680, neat 2.36(s,3H), 2.63(q,4H), CDCl.sub.3 2230 3.19(t,2H), 7.34(s,2H), and 11.57(br,1H) 1.00(t,3H), 1.16(t,6H), 1.73(six,2H), 2.32(s,3H),134 1640, 1660, KBr 2.63(q,4H), 3.21(t,2H), CDCl.sub.3 1685, 2230 6.27(s,1H), 7.36(s,2H), and 11.35(br.1H)135 1647, 1655, 1675 KBr 0.95(t,3H), 1.13(t,6H), 1.40-2.00(m,6H),136 1657, 1675 " 2.35-2.55(m,4H), CDCl.sub.3 2.52(q,4H), 3.19(t,2H), 7.15(s,2H), and 11.22(br,1H) 0.96(t,3H), 1.40-3.00(m,8H), 2.55(q,4H), 3.18(t,2H),137 7.17(s,2H), 11.08(br,1H), " and 1.14(t,6H)__________________________________________________________________________ TABLE 3______________________________________ Evaluation Conc. Plants (ppm) X Y Z______________________________________CompoundNo.1 20 1 1 1 100 5 4 32 20 1 2 1 100 5 5 43 20 5 5 5 100 5 5 56 20 2 5 1 100 5 5 37 20 1 2 1 100 4 5 28 20 2 5 1 100 5 5 310 20 1 2 3 100 3 2 311 20 2 2 3 100 2 5 413 20 5 5 5 100 5 5 514 20 1 1 4 100 1 3 515 20 5 5 5 100 5 5 516 20 5 5 5 100 5 5 518 20 2 1 1 100 3 4 219 20 1 2 1 100 4 3 120 20 4 4 3 100 5 5 521 20 1 4 4 100 5 5 523 20 5 5 3 100 5 5 524 20 5 5 5 100 5 5 525 20 4 4 3 100 4 5 426 20 4 5 5 100 5 5 527 20 3 5 5 100 5 5 528 20 5 5 5 100 5 5 529 20 5 5 5 100 5 5 530 20 3 5 5 100 5 5 531 20 4 5 5 100 5 5 532 20 5 5 5 100 5 5 533 20 5 5 5 100 5 5 537 20 5 5 4 100 5 5 539 20 1 2 4 100 4 4 540 20 1 4 5 100 1 4 541 20 2 4 5 100 5 4 542 20 5 5 5 100 5 5 543 20 5 5 5 100 5 5 544 20 4 5 4 100 4 5 547 20 5 5 5 100 5 5 548 20 2 2 2 100 4 3 550 20 2 2 2 100 2 3 351 20 5 5 5 100 5 5 556 20 1 1 1 100 2 5 258 20 1 1 2 100 3 3 459 20 4 4 5 100 5 5 560 20 1 2 3 100 2 4 361 20 3 3 1 100 3 4 362 20 1 3 2 100 2 3 263 20 1 1 2 100 2 3 364 20 2 5 5 100 5 5 565 20 5 5 5 100 5 5 566 20 5 5 5 100 5 5 569 20 1 4 3 100 2 4 370 20 5 5 5 100 5 5 571 20 5 5 5 100 5 5 572 20 4 5 3 100 5 5 573 20 5 5 5 100 5 5 574 20 4 5 5 100 5 5 575 20 5 5 5 100 5 5 576 20 5 5 5 100 5 5 577 20 2 5 5 100 2 5 578 20 1 3 3 100 2 3 379 20 1 3 2 100 2 3 281 20 1 2 4 100 2 2 585 20 2 4 5 100 2 5 586 20 5 5 5 100 5 5 587 20 5 5 5 100 5 5 588 20 5 5 5 100 5 5 589 20 5 5 5 100 5 5 590 20 2 4 4 100 2 4 491 20 5 5 2 100 5 5 392 20 4 5 3 100 4 5 393 20 2 3 2 100 3 4 294 20 5 5 5 100 5 5 595 20 4 4 5 100 5 5 596 20 3 3 4 100 4 4 597 20 4 5 5 100 5 5 598 20 5 5 4 100 5 5 599 20 5 5 3 100 5 5 4100 20 4 4 4 100 5 5 5101 20 4 5 3 100 5 5 4102 20 4 4 4 100 5 5 5103 20 4 4 4 100 5 5 5104 20 4 4 4 100 5 5 5105 20 5 5 5 100 5 5 5106 20 4 5 4 100 5 5 4107 20 4 5 5 100 5 5 5108 20 4 5 5 100 5 5 5109 20 4 5 5 100 5 5 5110 20 3 3 4 100 3 3 4111 20 4 5 4 100 5 5 5112 20 4 5 5 100 5 5 5113 20 1 3 2 100 2 4 3114 20 2 3 2 100 3 4 3115 20 1 1 1 100 2 3 2118 20 4 5 2 100 5 5 3119 20 4 5 4 100 5 5 5120 20 2 4 1 100 3 4 2121 20 3 3 1 100 3 3 2122 20 2 4 5 100 2 5 5123 20 3 5 5 100 5 5 5124 20 5 5 5 100 5 5 5125 20 4 5 5 100 5 5 5126 20 1 1 1 100 2 2 2127 20 5 5 5 100 5 5 5128 20 5 5 5 100 5 5 5129 20 5 5 5 100 5 5 5130 20 5 5 5 100 5 5 5131 20 5 5 5 100 5 5 5132 20 5 5 5 100 5 5 5133 20 5 5 5 100 5 5 5134 20 5 5 5 100 5 5 5135 20 5 5 5 100 5 5 5136 20 4 5 2 100 5 5 5137 20 5 5 5 100 5 5 5138 20 5 5 5 100 5 5 5139 20 5 5 5 100 5 5 5ReferenceCompoundNo.1 20 1 1 1 100 1 1 12 20 1 1 1 100 1 1 13 20 1 1 1 100 1 1 1______________________________________ X: Oryza sativa L. Y: Echinochloa crus-galli L. Z: Raphanus sativus L. (note) Reference compound No. 1: 2,6dimethyl-4-oxo-N--phenyl-4H--pyran-3-carboxamide, Reference compound No. 2: 2,6dimethyl-N--(3-nitrophenyl)-4-oxo-4H--pyran-3-carboxamide, Reference compound No. 3: 4oxo-N,2,6-triphenyl-4H--pyran-3-carboxamide.

It is clear from Table 3 that known compounds (Reference compound Nos. 1-3) have no plant-growth regulating activity, while the compounds of this invention have remarkable plant-growth regulating activity.

Claims

1. A compound of the formula (I) ##STR11## wherein: R.sub.1 is a C.sub.2-11 alkyl, a lower alkenyl, a lower alkynyl, a cycloalkyl, a lower alkoxyalkyl, a lower haloalkyl, an aralkyl selected from the group consisting of benzyl, 3-phenylpropyl and 4-phenylbutyl; or a substituted aralkyl selected from the group consisting of benzyl, 3-phenylpropyl and 4-phenylbutyl, wherein the phenyl group is substituted by halogen, lower alkyl, lower alkoxy, or cyano; or phenyl; or a phenyl substituted by halogen, lower alkyl, lower alkoxy, nitro or cyano;

R.sub.2, R.sub.3 and R.sub.4 are the same or different, and each is hydrogen, a halogen, cyano, nitro, amino, a lower alkyl, a lower haloalkyl, hydroxy, a lower alkoxy, an phenyloxy, naphthyloxy, carboxy or a lower alkoxycarbonyl;

R.sub.5 and R.sub.6 are combined to form a group of --(CH.sub.2).sub.m --, wherein m is 3 or 4.

2. A compound of claim 1 wherein ##STR12## in the formula (I) is phenyl.

3. A compound of claim 1 wherein ##STR13## in the formula (I) is 4-bromo-2,6-diethylphenyl, 4-chloro-2,6-diethylphenyl, 2,6-diethylphenyl or 2,3-dimethylphenyl.

4. A compound of claim 1 wherein R.sub.1 in the formula (I) is an alkyl, lower alkenyl or lower alkynyl group having 2 to 5 carbon atoms.

5. A compound of claim 1 wherein R.sub.1 in the formula (I) is 3-trifluoromethylphenyl, 3-chlorophenyl, 3-bromophenyl, 3-nitrophenyl or 3-cyanophenyl.

6. A compound of claim 1 selected from the group consisting of:

N-(4-bromo-2,6-diethylphenyl)-2-butyl-5,6,7,8-tetrahydro-4-oxo-4H-benzopyran-3-carboxamide,

2-butyl-N-(2,6-diethylphenyl)-4,5,6,7-tetrahydro-4-oxo-cyclopenta[b]pyran-3-carboxamide,

N-(2,6-diethylphenyl)-4,5,6,7-tetrahydro-4-oxo-2-propyl-cyclopenta[b]pyran-3-carboxamide, and

N-(4-bromo-2,6-diethylphenyl)-2-butyl-4,5,6,7-tetrahydro-4-oxo-cyclopenta[b]pyran-3-carboxamide.

7. A herbicidal composition comprising an inert carrier or solvent and a herbicidally effective amount of a compound of formula I: ##STR14## wherein: R.sub.1 is a C.sub.2-11 alkyl, a lower alkenyl, a lower alkynyl, a cycloalkyl, a lower alkoxyalkyl, a lower haloalkyl, an aralkyl selected from the group consisting of benzyl, 3-phenylpropyl and 4-phenylbutyl; or a substituted aralkyl selected from the group consisting of benzyl, 3-phenylpropyl and 4-phenylbutyl, wherein the phenyl group is substituted by halogen, lower alkyl, lower alkoxy, or cyano; or phenyl; or a phenyl substituted by halogen, lower alkyl, lower alkoxy, nitro or cyano;

R.sub.2, R.sub.3 and R.sub.4 are the same or different, and each is hydrogen, a halogen, cyano, nitro, amino, a lower alkyl, a lower haloalkyl, hydroxy, a lower alkoxy, an phenyloxy, naphthyloxy, carboxy or a lower alkoxycarbonyl;

R.sub.5 and R.sub.6 are combined to form a group of --(CH.sub.2).sub.m --, wherein m is 3 or 4.

8. A herbicidal composition of claim 7, wherein said compound of formula I is selected from the group consisting of:

N-(4-bromo-2,6-diethylphenyl)-2-butyl-5,6,7,8-tetrahydro-4-oxo-4H-benzopyran-3-carboxamide,

2-butyl-N-(2,6-diethylphenyl)-4,5,6,7-tetrahydro-4-oxo-cyclopenta[b]pyran-3-carboxamide,

N-(2,6-diethylphenyl)-4,5,6,7-tetrahydro-4-oxo-2-propyl-cyclopenta[b]pyran-3-carboxamide, and

N-(4-bromo-2,6-diethylphenyl)-2-butyl-4,5,6,7-tetrahydro-4-oxo-cyclopenta[b]pyran-3-carboxamide.