Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members

CCHEMISTRY METALLURGY C07Organic chemistry C07DHETEROCYCLIC COMPOUNDS

C07D213/00Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members

C07D213/02having three double bonds between ring members or between ring members and non-ring members C07D213/04having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom C07D213/06containing only hydrogen and carbon atoms in addition to the ring nitrogen atom C07D213/08Preparation by ring-closure C07D213/09involving the use of ammonia, amines, amine salts, or nitriles C07D213/10from acetaldehyde or cyclic polymers thereof C07D213/12from unsaturated compounds C07D213/127Preparation from compounds containing pyridine rings C07D213/133Preparation by dehydrogenation of hydrogenated pyridine compounds C07D213/14Preparation from compounds containing heterocyclic oxygen C07D213/16Containing only one pyridine ring C07D213/18Salts thereof C07D213/20Quaternary compounds thereof C07D213/22containing two or more pyridine rings directly linked together C07D213/24with substituted hydrocarbon radicals attached to ring carbon atoms C07D213/26Radicals substituted by halogen atoms or nitro radicals C07D213/28Radicals substituted by singly-bound oxygen or sulfur atoms C07D213/30Oxygen atoms C07D213/32Sulfur atoms C07D213/34to which a second heteroatom is attached C07D213/36Radicals substituted by singly-bound nitrogen atoms C07D213/38having only hydrogen, hydrocarbon radicals attached to the substituent nitrogen atom C07D213/40Acylated substituent nitrogen atom C07D213/42having hetero atoms attached to the substituent nitrogen atom C07D213/44Radicals substituted by doubly-bound oxygen, sulfur, or nitrogen atoms, or by two such atoms singly-bound to the same carbon atom C07D213/46Oxygen atoms C07D213/48Aldehydo radicals C07D213/50Ketonic radicals C07D213/51Acetal radicals C07D213/52Sulfur atoms C07D213/53Nitrogen atoms C07D213/54Radicals substituted by carbon atoms having three bonds to heteroatoms, with at the most one to halogen C07D213/55Acids Esters C07D213/56Amides C07D213/57Nitriles C07D213/58Amidines C07D213/59with at least one of the bonds being to sulfur C07D213/60with heteroatoms or with carbon atoms having three bonds to hetero atoms, with at the most one to halogen C07D213/61Halogen atoms or nitro radicals C07D213/62Oxygen or sulfur atoms C07D213/63One oxygen atom C07D213/64attached in position 2 or 6 C07D213/6432-Phenoxypyridines Derivatives thereof C07D213/647and having in the molecule an acyl radical containing a saturated three-membered ring C07D213/65attached in position 3 or 5 C07D213/66having in position 3 an oxygen atom and in each of the positions 4 and 5 a carbon atom bound to an oxygen, sulfur or nitrogen atom C07D213/672-Methyl-3-hydroxy-4,5-bis(hydroxy-methyl)pyridine C07D213/68attached in position 4 C07D213/69Two or more oxygen atoms C07D213/70Sulfur atoms C07D213/71to which a second hetero atom is attached C07D213/72Nitrogen atoms C07D213/73Unsubstituted amino or imino radicals C07D213/74Amino or imino radicals substituted by hydrocarbon or substituted hydrocarbon radicals C07D213/75Amino or imino radicals, acylated by carboxylic or carbonic acids, or by sulfur or nitrogen analogues thereof C07D213/76to which a second hetero atom is attached C07D213/77Hydrazine radicals C07D213/78Carbon atoms having three bonds to hetero atoms, with at the most one to halogen C07D213/79Acids Esters C07D213/80in position 3 C07D213/803Processes of preparation C07D213/807by oxidation of pyridines or condensed pyridines C07D213/81Amides Imides C07D213/82in position 3 C07D213/83Thio-acids Thio-esters Thio-amides Thio-imides C07D213/84Nitriles C07D213/85in position 3 C07D213/86Hydrazides Thio or imino analogues thereof C07D213/87in position 3 C07D213/88Nicotinoylhydrazones C07D213/89with hetero atoms directly attached to the ring nitrogen atom C07D213/90having more than three double bonds between ring members or between ring members and non-ring members