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:
Feb. 14, 1984
Filed:
Jan. 13, 1983
Michael D Broadhurst, Fairfield, CT (US);
James B Heather, Hercules, CA (US);
Stauffer Chemical Company, Westport, CT (US);
Abstract
A process for the preparation of sulfonium or sulfoxonium salts of N-phosphonomethylglycine which comprises: (1) reacting N-phosphonomethylglycine, a compound of the formula ##STR1## with a compound selected from the group consisting of those having the formula ##STR2## wherein R.sub.1, R.sub.2 and R.sub.3 are the same or different and are alkyl groups having from 1 to 4 carbon atoms or aromatic alkyl groups, X is chloride, bromide or iodide and Z is an electron pair or oxygen, or ##STR3## wherein R.sub.1, R.sub.2 and R.sub.3 are the same or different and are alkyl groups having from 1 to 4 carbon atoms and are the same as in (a) above, R.sub.4 is an alkyl group having from 1 to 12 carbon atoms, aromatic or aromatic alkyl groups, X is chlorine or iodine, and Y is nitrogen or phosphorus, said reaction being conducted in the presence of a trialkylamine of the formula