NEW ENANTIODIVERGENT PROCEDURE FOR THE SYNTHESES OF CHIRAL ALPHA-SUBSTITUTED SERINES FROM ALPHA-ALKYL-ALPHA-AMINOMALONATES UTILIZING ENZYMATIC-HYDROLYSIS
S. Sano et al., NEW ENANTIODIVERGENT PROCEDURE FOR THE SYNTHESES OF CHIRAL ALPHA-SUBSTITUTED SERINES FROM ALPHA-ALKYL-ALPHA-AMINOMALONATES UTILIZING ENZYMATIC-HYDROLYSIS, Tetrahedron letters, 39(31), 1998, pp. 5571-5574
Porcine liver eaterase (PLE)- or rabbit liver eaterase (RLE)-catalyzed
hydrolysis of the pro-S eater group of diethyl alpha-alkyl-alpha -(be
nzyloxycarbonylamino)malonate s 2a-e afforded (R)-ethyl alpha-alkyl-al
pha -(benzyloxycarbonylamino)malonates 3a-e each in excellent enantiom
eric excess. Enantiodivergent reductions of these acid eaters 3a-e rea
dily furnished both the corresponding enantiomeric alpha-substituted s
erines (R)- and (S)-5a-c. (C) 1998 Elsevier Science Ltd. All rights re
served.