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:
Oct. 11, 2022
Filed:
Feb. 16, 2018
Avihai Yacovan, Mazkeret Batya, IL;
Alexander Shterenberg, Rehovot, IL;
Leonid Erchov, Beit Shemesh, IL;
Sveta Fronton, Modi'in, IL;
Gerd-volker Roeschenthaler, Bremen, DE;
Mykhailo Shevchuk, Bremen, DE;
Olesya Stubbmann-kazakova, Bassum, DE;
Nataliya Kalinovich, Bremen, DE;
Avihai Yacovan, Mazkeret Batya, IL;
Alexander Shterenberg, Rehovot, IL;
Leonid Erchov, Beit Shemesh, IL;
Sveta Fronton, Modi'in, IL;
Gerd-Volker Roeschenthaler, Bremen, DE;
Mykhailo Shevchuk, Bremen, DE;
Olesya Stubbmann-Kazakova, Bassum, DE;
Nataliya Kalinovich, Bremen, DE;
ADAMA AGAN LTD., Ashdod, IL;
Abstract
The present subject matter provides a safe alternative for producing an important intermediate useful for preparing the herbicide glufosinate, without need for chlorine components in the manufacturing process. In particular, a process for preparing alkyl phosphinic aid alkyl ester is provided, including the step of alkylating alkyl phosphinic acid ester in a non-polar solvent in the same apparatus as used to first produce the alkyl phosphinic acid ester, and without isolating the alkyl phosphinic acid ester before the alkylation step is conducted. More specifically, a process is presented for preparing methyl phosphinic acid butyl ester, by alkylating butyl phosphinic acid ester in a non-polar solvent, in the same apparatus as used previously to first produce the butyl phosphinic acid ester and without isolating the butylphosphinic acid ester before alkylation.