Diastereoselective reduction of ketimines derived from (R)-3,4-dihydroxybutan-2-one: an alternative route to key intermediates for the synthesis of anticancer agent ES-285
摘要:
A simple and convenient procedure for the diastereoselective reduction of imines derived from (R)-3,4-dihydroxybutan-2-one is described. The use of sodium borohydride as a reducing agent in the reactions with pre-synthesised imines gave aminodiol derivatives with the appropriate stereochemistry for use as intermediates in the synthesis of anticancer agent ES-285. The aminodiols were isolated in ca. 62% yield. (C) 2010 Elsevier Ltd. All rights reserved.
Diastereodifferentiation in SN2' additions of methylcuprates to nonracemic acyclic vinyloxiranes
作者:James A. Marshall、Bruce E. Blough
DOI:10.1021/jo00006a049
日期:1991.3
S(N)2' additions of Me2CuLi, MeCu(CN)Li, and Me2Cu(CN)Li2 to the 2S and 2R alkoxy cis-(Z)- and -(E)- vinyloxiranes 8, 9, 13, and 14 were examined as possible routes to acrylic subunits of polypropionate natural products. Highest antisyn ratios were found for the (2S)- and (2R)-hydroxy-(E)-vinyloxiranes 13a and 14a followed by the (2R)-MTM ether analogue 14c. In both cases Me2CuLi gave higher ratios than either of the cyanocuprates (> 99:1 vs 14:1 for 13a/13b and > 40:1 vs approximately 24:1 for 14c).
Metal ion controlled addition to .alpha.,.beta.-dialkoxy carbonyl compounds
作者:Keith Mead、Timothy L. Macdonald
DOI:10.1021/jo00203a040
日期:1985.2
Diastereoselective reduction of ketimines derived from (R)-3,4-dihydroxybutan-2-one: an alternative route to key intermediates for the synthesis of anticancer agent ES-285
作者:Ana C. Allepuz、Ramón Badorrey、María D. Díaz-de-Villegas、José A. Gálvez
DOI:10.1016/j.tetasy.2010.02.012
日期:2010.3
A simple and convenient procedure for the diastereoselective reduction of imines derived from (R)-3,4-dihydroxybutan-2-one is described. The use of sodium borohydride as a reducing agent in the reactions with pre-synthesised imines gave aminodiol derivatives with the appropriate stereochemistry for use as intermediates in the synthesis of anticancer agent ES-285. The aminodiols were isolated in ca. 62% yield. (C) 2010 Elsevier Ltd. All rights reserved.
MEAD, K.;MACDONALD, T. L., J. ORG. CHEM., 1985, 50, N 3, 422-424