| 摘要 |
<p>METHOD FOR PREPARATION OF SALTS OF N-PHOSPHONMETHYLGLYCINE A process for the preparation of sulfonium or sulfoxonium salts of N-phosphonomethylglycine which comprises: (1) reacting N-phosphonomethylglycine, a compound of the formula < IMG > with a compound selected from the group consisting of those having the formula (a) < IMG > wherein R1, R2 and R3 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 (b) < IMG > wherein R1, R2 and R3 are the same of different and are alkyl groups having from 1 to 4 carbon atoms and are the same as in (a) above, R4 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 (R)3N 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 reaction, and (2) isolating the end product by phase separation.</p> |
