作者:Tetsuo Iwama、Miyoko Ogawa、Tadashi Kataoka、Osamu Muraoka、Genzoh Tanabe
DOI:10.1016/s0040-4020(98)00510-9
日期:1998.7
Selective CS bond cleavage of a β-sultam ring was achieved by the reactions with Lewis acids. Aryl ketones or aldehyde were provided from 3-aryl-β-sultams whereas β-sultams bearing a poorly migratory substituent at C-3 gave trans-1,2,3-oxathiazolidine 2-oxides and/or cis-aziridines. These reactions were influenced by the cation-stabilizing capability of C-4 substituents and by the configuration of
通过与路易斯酸的反应,实现了β-杜马环的选择性CS键裂解。由3-芳基-β-sultams提供芳基酮或醛,而在C-3处带有较差迁移性取代基的β-sultams提供反式-1,2,3-氧杂噻唑烷2-氧化物和/或顺式-氮丙啶。这些反应受C-4取代基的阳离子稳定能力以及C-3和C-4上取代基的构型的影响。某些4-烯基-3-芳基-β-sultams进行串联分子内环化反应,通过CS键断裂过程得到双环[3.2.1]-和[2.2.1]-γ-sultams ,1,2-芳基转移,阳离子-烯烃环化和磺酰基阴离子的重组。