Stereoselective azide cycloaddition to chiral cyclopentanone enamines

被引:14
作者
Fioravanti, S [1 ]
Pellacani, L [1 ]
Ricci, D [1 ]
Tardella, PA [1 ]
机构
[1] UNIV ROMA LA SAPIENZA,DIPARTIMENTO CHIM,I-00185 ROME,ITALY
关键词
D O I
10.1016/S0957-4166(97)00239-5
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The enamine derived from cyclopentanone and (2R,5R)-2,5-bis(methoxymethyl)pyrrolidine added ethyl N-mesylazidoformimidate [N3C(OEt)NMs] and ethyl azidoformate (N3CO2Et) with high asymmetric induction (>95%), while the corresponding cyclohexanone enamine gave ring contraction products. With the same azides the cyclopentanone enamine, prepared from (S)-2-(methoxymethyl)pyrrolidine gave N-substituted alpha-amino cyclopentanones in moderate enantiomeric excess. (C) 1997 Elsevier Science Ltd.
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收藏
页码:2261 / 2266
页数:6
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