ENANTIOSELECTIVE INTRAMOLECULAR CYCLOPROPANATION OF N-ALLYLIC AND N-HOMOALLYLIC DIAZOACETAMIDES CATALYZED BY CHIRAL DIRHODIUM(II) CATALYSTS

被引:12
作者
DOYLE, MP
EISMONT, MY
PROTOPOPOVA, MN
KWAN, MMY
机构
[1] Department of Chemistry, Trinity University, San Antonio
关键词
D O I
10.1016/S0040-4020(01)89383-2
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Diazodecomposition of N-(tert-butyl)-N-(3-buten-1-yl)diazoacetamides catalyzed by dirhodium(II) tetrakis[methyl 2-pyrrolidone-5(S)-carboxylate], Rh-2(5S-MEPY)(4), and tetrakis[methyl 2-oxazolidinone-4(S)-carboxylate], Rh-2(4S-MEOX)(4), forms products from intramolecular cyclopropanation in good yields with enantiomeric excesses ranging from 60-90%. Intramolecular cyclopropanation with N,N-diallyldiazoacetamide (72% ee) is competitive with intramolecular [3+2] dipolar cycloaddition.
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页码:4519 / 4528
页数:10
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