Neighboring group effect of five-membered heteroaromatic rings for π-facial selectivity in the reactions of fused isopropylidenenorbornene systems with electrophilic reagents
作者:Tomoshige Kobayashi、Takeo Tsuzuki、Yoko Tayama、Yosuke Uchiyama
DOI:10.1016/s0040-4020(01)00916-4
日期:2001.10
electrophilic reactions of novel isopropylidenenorbornadienes and isopropylidenenorbornenes fused with a furan, pyrrole, thiophene, and pyrazole ring with 1,2,4-triazole-3,5-(4H)-dione, m-chloroperbenzoic acid, dichlorocarbene, and N-bromosuccinimide (NBS) indicated that the neighboring group effect of the five-membered heteroaromatic rings was, unexpectedly, almost similar to that of a benzene ring except
新颖isopropylidenenorbornadienes和isopropylidenenorbornenes的具有呋喃,吡咯稠合亲电反应,噻吩,和吡唑环与1,2,4-三唑-3,5-(4 ħ) -二酮,中号氯过苯甲酸,二氯卡宾,和Ñ -溴代琥珀酰亚胺(NBS)表明,五元杂芳族环的邻近基团效应出乎意料地几乎与苯环相似,除了与NBS的反应。