The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 24, 1979
Filed:
Oct. 05, 1977
Alexandr I Razumov, Kazan, SU;
Raisa I Tarasova, Kazan, SU;
Valentina G Nikolaeva, Kazan, SU;
Rimma L Yafarova, Kazan, SU;
Other;
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.