A facile synthesis of optically pure L-armentomycin and its D-isomer.Highly enantioselective reduction of the CC double bond of methyl (E)- and (Z)-2,4,4-trichloro-2-butenoate by using baker's yeast
作者:Masanori Utaka、Satoshi Konishi、Toshiyasu Okubo、Sadao Tsuboi、Akira Takeda
DOI:10.1016/s0040-4039(00)95950-1
日期:——
Optically pure L-armentomycin [(S)-2-amino-4,4-dichlorobutanoic acid] and its D-isomer [(R)-2-amino-4,4-dichlorobutanoic acid] were prepared by using methyl (E)- and (Z)-2,4,4-trichloro-2-butenoate as key intermediate, which were reduced with baker's yeast to (R)- and (S)-2,4,4-trichlorobutanoate in 84~92 and 97~98% ee, respectively, in 60~65% yields.
使用甲基(E)制备光学纯的L-阿曼霉素[(S)-2-氨基-4,4-二氯丁酸]及其D-异构体[(R)-2-氨基-4,4-二氯丁酸]。-和(Z)-2,4,4-三氯-2-丁烯酸酯为关键中间体,在84〜92和97中用面包酵母还原为(R)-和(S)-2,4,4-三氯丁酸酯ee分别为〜98%ee,产率为60〜65%。