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:
Nov. 15, 1983
Filed:
Sep. 28, 1982
Jeffrey D Robbins, Berkeley, CA (US);
Stauffer Chemical Company, Westport, CT (US);
Abstract
Disclosed is a method for the preparation of N-phosphonomethylglycine which comprises the steps of (a) reacting 1,3,5-tri-(substituted methyl) hexahydro-s-triazine, a compound of the formula ##STR1## wherein R, R.sub.1 and R.sub.2 are the same or different and are selected from the group consisting of cyano, alkoxycarbonyl wherein the alkyl group ranges from 2 to 18 carbon atoms, and aryloxycarbonyl wherein the aryl group ranges from 6 to 12 carbon atoms, with a substituted phosphorus compound having the formula PXYZ wherein X is a halogen, Y and Z are each independently selected from the group consisting of halogen, alkoxy having from 1 to 10 carbon atoms and aryloxy, in the presence of a low molecular weight carboxylic acid solvent and a protic acid; (b) treating the reaction mixture with water; (c) removing said solvent and hydrolyzing the residue with aqueous alkali to generate a salt of N-phosphonomethylglycine; and (d) neutralizing said salt with an acid to produce the end product, N-phosphonomethylglycine.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile