A convenient access to (3S)-3-(triisopropylsilyl)oxy-1-pyrroline N-oxide, a useful intermediate for polyfunctionalized enantiopure indolizidine and pyrrolizidine synthesis

被引:53
作者
Goti, A [1 ]
Cacciarini, M [1 ]
Cardona, F [1 ]
Brandi, A [1 ]
机构
[1] Univ Florence, Dipartimento Chim Organ Ugo Schiff, CNR, CSCEA, I-50121 Florence, Italy
关键词
nitrones; indolizidines; pyrrolizidines; asymmetric synthesis;
D O I
10.1016/S0040-4039(99)00310-X
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Optimization of a strategy providing the enantiomerically pure nitrone 2 in five steps and 28% overall yield from L-malic acid has been achieved by the combined use of DIBAL-H as the reductant and triisopropylsilyl as the protecting group. The utility of nitrone 2 as synthetic intermediate is demonstrated by a ready access to polyhydroxylated indolizidines and pyrrolizidines via stereoselective 1,3-dipolar cycloaddition reactions. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:2853 / 2856
页数:4
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