Claims
- 1. A process for producing a biphenyl phosphorus compound expressed by the general formula (2) ##STR11## wherein R.sub.1, R.sub.2 and R.sub.3 which may be the same or different are hydrogen, a halogen atom, an alkyl group, a cycloalkyl group, an aryl group or an aralkyl group, which comprises hydrolysing a cyclic organic phosphorus compound expressed by the general formula (1) ##STR12## wherein X is chlorine or bromine, and R.sub.1, R.sub.2 and R.sub.3 are the same as defined in the general formula (2), in the presence of an organic solvent which is insoluble in water and is inert in the reaction system and 5.about.20 molar equivalents of water (based upon a 2-phenylphenol compound which is reacted with phosphorus trihalide to form the 6-halo-(6H)-dibenzo[c.e][1,2]-oxaphosphorin compound of formula (1)) under normal pressure or elevated pressure, followed by washing the resulting organic solvent layer with water to obtain the compound expressed by the general formula (2).
- 2. A process for producing a cyclic organic phosphorus compound expressed by the general formula (3) ##STR13## wherein R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, are hydrogen, a halogen atom, an alkyl group, a cycloalkyl group, an aryl group or an aralkyl group, which comprises hydrolyzing a cyclic organic phosphorus compound expressed by the general formula (1) ##STR14## wherein X is chlorine or bromine, and R.sub.1, R.sub.2 and R.sub.3 are the same as defined in the general formula (3), in the presence of an organic solvent which is insoluble in water and is inert in the reaction system and 5.about.20 molar equivalents of water (based upon a 2-phenylphenol compound which is reacted with phosphorus trihalide to form the 6-halo-(6H)-dibenzo[c.e][1,2]-oxaphosphorin compound of formula (1) under normal pressure or elevated pressure to obtain the biphenyl phosphorus compound expressed by the general formula (2) ##STR15## wherein R.sub.1, R.sub.2 and R.sub.3 are the same as defined in the general formula (3), then washing the organic solvent layer containing said biphenyl phosphorus compound with water, and carrying out a cyclising dehydration reaction of said biphenyl phosphorus compound to obtain the compound expressed by the general formula (3).
- 3. The process for producing a cyclic organic phosphorus compound expressed by the general formula (3) according to claim 2, wherein said biphenyl phosphorus compound expressed by the general formula (2) is isolated from an organic solvent layer washed with water after the hydrolysis reaction in claim 2 and then, a cyclising dehydration under heating is carried out.
- 4. The process for producing a cyclic organic phosphorus compound expressed by the formula (3) according to claim 2, wherein the cyclising dehydration under heating of said biphenyl phosphorus compound expressed by the general formula (2) is carried out by azeotropic dehydration.
- 5. A process for producing a biphenyl phosphorus compound expressed by the general formula (2) ##STR16## wherein R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, are hydrogen, a halogen atom, an alkyl group, a cycloalkyl group, an aryl group or an aralkyl group, which comprises carrying out a condensation reaction between a o-phenyl phenol compound expressed by the general formula (4) ##STR17## wherein R.sub.1, R.sub.2 and R.sub.3 are the same as defined in the general formula (2), and a phosphorus trihalide expressed by the general formula (5)
- PX.sub.3 ( 5)
- wherein X is chlorine or bromine, in the presence of Friedel Crafts catalyst to obtain a 6-halo-(6H)-dibenzo[c.e][1,2]-oxaphosphorin compound expressed by the general formula (1) ##STR18## wherein X is chlorine or bromine, R.sub.1, R.sub.2 and R.sub.3 are the same as defined in the general formula (2) and then, hydrolyzing said cyclic organic phosphorus compound in the presence of an organic solvent which is insoluble in water and is inert in the reaction system and 5.about.20 molar equivalents of water based upon the 2-phenylphenol compound of formula (4) under normal pressure or elevated pressure, followed by washing the resulting organic solvent layer with water to obtain the compound expressed by the general formula (2).
- 6. A process for producing a cyclic organic phosphorus compound expressed by the general formula (3) ##STR19## wherein R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, are hydrogen, a halogen atom, an alkyl group, a cycloalkyl group, an aryl group or an aralkyl group, which comprises carrying out a condensation reaction between a o-phenyl phenol compound expressed by the general formula (4) ##STR20## wherein R.sub.1, R.sub.2 and R.sub.3 are the same as defined in the general formula (3), and a phosphorus trihalide expressed by the general formula (5)
- PX.sub.3 ( 5)
- wherein X is chlorine or bromine, in the presence of Friedel Crafts catalyst to obtain a 6-halo-(6H)-dibenzo[c.e][1,2]-oxaphosphorin compound expressed by the general formula (1) ##STR21## wherein X is chlorine or bromine, and R.sub.1, R.sub.2 and R.sub.3 are the same as defined in the general formula (3), hydrolyzing said cyclic organic phosphorus compound in the presence of an organic solvent which is insoluble in water and is inert in the reaction system and 5.about.20 molar equivalents of water based upon the 2-phenylphenol compound of formula (4) under normal pressure or elevated pressure to obtain the biphenyl phosphorus compound expressed by the general formula (2) ##STR22## wherein R.sub.1, R.sub.2 and R.sub.3 are the same as defined in the general formula (3) and then, washing the organic solvent layer containing said biphenyl phosphorous compound with water, followed by carrying out a cyclising dehydration reaction of said biphenyl phosphorus compound to obtain the compound expressed by the general formula (3).
- 7. The process for producing a cyclic organic phosphorus compound expressed by the general formula (3) according to claim 6, wherein said biphenyl phosphorus compound expressed by the general formula (2) is isolated from an organic solvent layer washed with water after the hydrolysis reaction in claim 6 and then, a cyclising dehydration under heating is carried out.
- 8. The process for producing a cyclic organic phosphorus compound expressed by the formula (3) according to claim 6, wherein the cyclising dehydration under heating of said biphenyl phosphorus compound expressed by the general formula (2) is carried out by azeotropic dehydration.
Parent Case Info
This application is a continuation of PCT International Application No. PCT/JP96/03114, filed Oct. 25, 1996.
US Referenced Citations (3)
Foreign Referenced Citations (4)
Number |
Date |
Country |
2 034 887 |
Jan 1972 |
DEX |
47-16436 |
Sep 1972 |
JPX |
49-45397 |
Dec 1974 |
JPX |
1 547 105 |
Jun 1979 |
GBX |
Continuations (1)
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Number |
Date |
Country |
Parent |
PCTJP9603114 |
Oct 1996 |
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