| 摘要 |
The invention relates to an N-sulfomethylglycinate of formula: HO3S-CH2-NH-CH2-COOR1 (I) COOR1 being a hydrolysable carboxylic ester group. It also relates to a process for the preparation of the compound of formula (I) consisting in putting in contact sulfur dioxide, formaldehyde, and glycine in the presence of a R1OH alcohol, or glycinate. It also relates to the use of the compound of formula (I) for the preparation of herbicides of the glyphosate type of reaction with a phosphite or a phosphonate of formula (R2O)2 P (O) H in which (R2O)2 P is a hydrolysable phosphonic ester group, then optionally by a subsequent hydrolysis reaction.
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