Method for preparation of salts of N-phosphonomethylglycine
US4431594A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1983 |
| Grant date | Feb 14, 1984 |
| Priority date | — |
| Expiry date | Jan 13, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/3813
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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 EQU (R).sub.3 N wherein each R is the same or different and is an alkyl group ranging from 4 to 13 carbon atoms, all in the presence of water and a polar functional organic solvent which is immiscible in water, said reaction being conducted at a temperature and for a sufficient period of time to cause completion of the r…
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