New synthetic method of optically active α-methylproline and α-methyl-pipecolinic acid using electrochemical oxidation as a key reaction
作者:Yoshihiro Matsumura、Toshio Kinoshita、Yuka Yanagihara、Noriko Kanemoto、Mitsuaki Watanabe
DOI:10.1016/0040-4039(96)01919-3
日期:1996.11
method consisted of electrochemical α′-methoxylation of the α-amino acid derivatives, the replacement of the α′-methoxy group with a phenylthio group, α-methylation, and reductive removal of the α′-phenylthio group, successively. The intermediates in this method could be used for the preparation of optically active acyclic α-methylated α-amino acids.
提出了一种新的方法,用于N-保护的L-脯氨酸和L-哌啉酸酯的立体选择性α-甲基化。该方法包括依次进行α-氨基酸衍生物的电化学α'-甲氧基化,用苯硫基取代α'-甲氧基,α-甲基化和还原性除去α'-苯硫基。该方法中的中间体可用于制备光学活性的无环α-甲基化的α-氨基酸。