TY - JOUR
T1 - Construction of contiguous tetrasubstituted chiral carbon stereocenters via direct catalytic asymmetric aldol reaction of α-isothiocyanato esters with ketones
AU - Yoshino, Tatsuhiko
AU - Morimoto, Hiroyuki
AU - Lu, Gang
AU - Matsunaga, Shigeki
AU - Shibasaki, Masakatsu
N1 - Copyright:
Copyright 2010 Elsevier B.V., All rights reserved.
PY - 2009/12/2
Y1 - 2009/12/2
N2 - (Chemical Equation Presented) Construction of contiguous tetrasubstituted chiral carbon stereocenters via direct catalytic asymmetric aldol reaction of α-substituted α-isothiocyanato esters with unactivated simple ketones is described. A Bu2Mg/Schiff base catalyst promoted the aldol addition/cyclization sequence at room temperature, giving protected α-amino-β-hydroxy esters with contiguous tetrasubstituted chiral carbon stereocenters in 99 to 68% yield, 98:2 to 74:26 dr, and 98 to 82% ee.
AB - (Chemical Equation Presented) Construction of contiguous tetrasubstituted chiral carbon stereocenters via direct catalytic asymmetric aldol reaction of α-substituted α-isothiocyanato esters with unactivated simple ketones is described. A Bu2Mg/Schiff base catalyst promoted the aldol addition/cyclization sequence at room temperature, giving protected α-amino-β-hydroxy esters with contiguous tetrasubstituted chiral carbon stereocenters in 99 to 68% yield, 98:2 to 74:26 dr, and 98 to 82% ee.
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U2 - 10.1021/ja908571w
DO - 10.1021/ja908571w
M3 - Article
C2 - 19894736
AN - SCOPUS:72249092076
VL - 131
SP - 17082
EP - 17083
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 47
ER -