New enantiodivergent procedure for the syntheses of chiral α-substituted serines from α-alkyl-α-aminomalonates utilizing enzymatic hydrolysis
作者:Shigeki Sano、Kazuhiko Hayashi、Toshio Miwa、Takahiro Ishii、Michiho Fujii、Hiromi Mima、Yoshimitsu Nagao
DOI:10.1016/s0040-4039(98)01123-x
日期:1998.7
Porcine liver esterase (PLE)- or rabbit liver esterase (RLE)-catalyzed hydrolysis of the pro-S ester group of diethyl α-alkyl-α-(benzyloxycarbonylamino)malonates 2a-c afforded (R)-ethyl α-alkyl-α-(benzyloxycarbonylamino)malonates 3a-c each in excellent enatiomeric excess. Enantiodivergent reductions of these acid esters 3a-c readily furnished both the corresponding enantiomeric α-substituted serines
猪肝酯酶(PLE)或兔肝酯酶(RLE)催化的二乙基α-烷基-α-(苄氧基羰基氨基)丙二酸酯2a-c的pro- S酯基水解,得到(R)-乙基α-烷基-α -(苄氧羰基氨基)丙二酸酯各自以优异的对映体过量3a-c。这些酸酯3a-c的对映异构还原可容易地提供相应的对映体α-取代的丝氨酸(R)-和。