Chemoenzymatic stereoconvergent synthesis of 3-O-benzoyl azidosphingosine

被引:17
作者
Compostella, F
Franchini, L
Giovenzana, GB
Panza, L
Prosperi, D
Ronchetti, F
机构
[1] Univ Piemonte Orientale, Dipartimento Sci Chim Alimentari Farmaceut & Farm, I-28100 Novara, Italy
[2] Univ Milan, Dipartimento Chim & Biochim Med, I-20133 Milan, Italy
关键词
D O I
10.1016/S0957-4166(02)00201-X
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The synthesis of 3-O-benzoyl azidosphingosine 1 through a stereoconvergent approach is described. Nucleophilic addition of the Grignard reagent of 1-pentadecyne to cyclohexylidene-D-glyceraldehyde results in a mixture of diastereoisomeric propargylic alcohols. Subsequent enzymatic separation of these diastereoisomers, mediated by lipase from Candida antarctica, Mitsunobu inversion on the wrong diastereoisomer and extremely efficient introduction of azide using a chloromesylate leaving group affords the title compound in 30% overall yield. (C) 2002 Elsevier Science Ltd. All rights reserved.
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页码:867 / 872
页数:6
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