Production of N-substituted 2-carbamoyl phosphinic acids

Details Production of N-substituted 2-carbamoyl phosphinic acids Production of N-substituted 2-carbamoyl phosphinic acids

1977-10-25

1978-08-08

Evans, Joseph E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260543P, C07F 930, C07F 934

Patent

active

041056892

ABSTRACT:
Production of N-substituted 2-carbamoyl phosphinic acids of the general formula: ##STR1## in which R.sup.1 stands for an alkyl group having 1 to 4 carbon atoms or an aryl group; R.sup.2 and R.sup.3 stand independently of each other for an alkyl group having 1 to 4 carbon atoms, an aryl group or a hydrogen atom; R.sup.4 stands for an alkyl group having 1 to 18 carbon atoms, an aryl group or a hydrogen atom; and R.sup.5 stands for an alkyl group having 1 to 18 carbon atoms or an aryl group. More specifically, a 2-chloroformyl phosphinic acid chloride of the general formula ##STR2## is reacted at 120.degree. to 170.degree. C with an amine of the general formula ##STR3## and resulting N-substituted 2-carbamoyl phosphinic acid chloride of the general formula ##STR4## the latter compound being obtained while hydrogen chloride is split off, is hydrolyzed with water.

REFERENCES:
patent: 2304156 (1942-12-01), Engelmann et al.
patent: 2670369 (1954-02-01), Filatoff-Rocg et al.
patent: 2758956 (1956-08-01), Shalit et al.
patent: 3980614 (1976-09-01), Noetzel et al.
Pudovik et al., "Chem. Abstracts", vol. 67 (1967), 32744v.
Pudovik et al., "Chem. Abstracts", vol. 72 (1970), 12830v.

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