Enantioselective synthesis of 3-functionalized 2-azabicyclo[2.2.1]hept-5-enes by hetero Diels-Alder addition to cyclopentadiene

被引:24
|
作者
Blanco, JM
Caamaño, O
Fernández, F
García-Mera, X [1 ]
López, C
Rodríguez, G
Rodríguez-Borges, JE
Rodríguez-Hergueta, A
机构
[1] Univ Santiago, Fac Farm, Dept Quim Organ, E-15706 Santiago, Spain
[2] Univ Autonoma Madrid, Fac Ciencias, Dept Quim Organ, E-28048 Madrid, Spain
关键词
D O I
10.1016/S0040-4039(98)01102-2
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Diels-Alder cycloaddition of N-benzyl imine of (1R)-8-phenylmenthyl glyoxylate to cyclopentadiene gave the mixture of adducts 3a-d. Major diastereoisomer, the (1S,exo)-adduct (3a), was isolated in 57% yield and transformed in 74% overall yield into (+)-(1S)-N-benzoyl-2-azabicyclo[2.2.1]heptan-3-one (8). which was compared with an authentic sample of its enantiomer. In the course of this transformation sequence, the chiral auxiliary (1R)-8-phenylmenthol was recovered in 90% yield. (C) 1998 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:5663 / 5666
页数:4
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