A method for efficiently producing L-2-amino-4-(hydroxymethylphosphinyl)-butanoic acid, useful as a herbicide, by a catalytic asymmetric synthesis reaction with a high asymmetric yield. The method includes a step in which a compound represented by the below formula (1) and a benzylamine are reacted in the presence of dehydrating agent, then the resulting mass is reacted with hydrogen cyanide in the presence of an asymmetric catalyst, followed by acid hydrolysis, further followed by elimination of a protective group. [chemical formula 1] (1) (where, R
1
represents a C
1-4
alkyl group.)
一种高效生产
L-2-
氨基-4-(羟
甲基膦基)-
丁酸,用作
除草剂的方法,通过具有高不对称产率的催化不对称合成反应。该方法包括以下步骤:在脱
水剂存在下,将化合物(1)和苄基胺反应,然后在不对称催化剂存在下将所得物质与
氢氰酸反应,随后进行酸
水解,进一步进行保护基的消除。[
化学式1] (1) (其中,R1表示C1-4烷基。)