Hydroformylation–Amidocarbonylation of Methylvinylphosphinate. Application to Synthesis of Glufosinate
作者:Toshiyasu Sakakura、Xin-Yan Huang、Masato Tanaka
DOI:10.1246/bcsj.64.1707
日期:1991.5
Glufosinate, 2-amino-4-[(hydroxy)methylphosphinyl]butanoic acid, (2a) was synthesized from 2-chloroethyl methylvinylphosphinate (1a) via successive hydroformylation–amidocarbonylation. Hydroformylation of 1a catalyzed by Co2(CO)8 in methanol gave 2-chloroethyl (3,3-dimethoxypropyl)methylphosphinate (5). Crude 5 was subjected to cobaltcatalyzed amidocarbonylation to afford N-acylglufosinic acid methyl ester (2b). Hydrolysis of 2b under acidic conditions gave 2a quantitatively.
草铵膦,2-氨基-4-[(羟基)甲基次膦基]丁酸,(2a)是由2-氯乙基甲基乙烯基次膦酸酯(1a)通过连续加氢甲酰化-酰氨基羰基化合成的。 1a 在甲醇中经 Co2(CO)8 催化加氢甲酰化,得到 (3,3-二甲氧基丙基)甲基次膦酸 2-氯乙酯 (5)。将粗品5进行钴催化的酰氨基羰基化,得到N-酰基草铵膦酸甲酯(2b)。 2b在酸性条件下水解定量得到2a。