摘要:
A process for the preparation of a glyphosate product. An .alpha.-substituted N-phosphonomethylamino diacetic acid substrate is contacted in an aqueous medium with molecular oxygen in the presence of a catalyst for the oxidative cleavage of a substituent from the imino nitrogen of the substrate. Cleavage produces a glyphosate product, carbon dioxide, a higher aldehyde, or ketone. Novel intermediates and methods of preparation thereof are also disclosed.
摘要:
A process for the preparation of a glyphosate product. An .alpha.-substituted N-phosphonomethylamino diacetic acid substrate is contacted in an aqueous medium with molecular oxygen in the presence of a catalyst for the oxidative cleavage of a substituent from the imino nitrogen of the substrate. Cleavage produces a glyphosate product, carbon dioxide, a higher aldehyde, or ketone. Novel intermediates and methods of preparation thereof are also disclosed.
摘要:
There is disclosed a process for producing the alkali metal salts of N-phosphonomethylglycine which comprises heating to an elevated temperature a di-alkali metal salt of N-alkyl-N-(2-hydroxyethyl)aminomethylphosphonic acid.
摘要:
A process for producing an aromatic thiolester by mixing an alkyl or aryl thiol with an alkali metal hydroxide aqueous solution and, in the presence of a phase transfer catalyst, reacting it with an aromatic acid halide. Diacid halides may be used to produce bisthiol esters.
摘要:
There is disclosed a process for the preparation of N-phosphonomethylglycine by dealkylation of N-alkyl-N-phosphonomethylglycine. The N-alkyl moiety contains an electron withdrawing group in the 2-position. Certain novel N-alkyl-N-phosphonomethylglycines are disclosed.