Process for preparing diphenylphosphinylacetic acid hydrazide

Details Process for preparing diphenylphosphinylacetic acid hydrazide Process for preparing diphenylphosphinylacetic acid hydrazide

1977-10-05

1979-07-24

Waltz, Thomas

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C10200

Patent

active

041622642

ABSTRACT:
The process according to the present invention comprises reacting diphenylchlorophosphine with ethylene oxide in a medium of an inert organic solvent. The resulting reaction mixture is heated in the presence of an alkyl ester of a haloacetic acid until the formation of an alkyl ester of diphenylphosphinylacetic acid. The latter, without separation and any additional purification, is reacted with hydrazine hydrate. The advantage of the process according to the present invention resides in a simplified technology, preparation of the desired product in a single stage at a high yield and the use of readily available commercially produced reagents.

REFERENCES:
patent: 2899424 (1959-08-01), Rudner
patent: 2953570 (1960-09-01), Rudner
patent: 3485806 (1969-12-01), Bloomquist et al.
patent: 3946131 (1976-03-01), Biefeld et al.

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