Neighboring Group Participation by Heteroaromatic Rings: The Wagner–Meerwein Type Skeletal Rearrangement in the Electrophilic Addition Reactions of Norbornadiene-Fused Furans, Pyrroles, and Thiophenes
作者:Tomoshige Kobayashi、Takeo Tsuzuki、Mayu Saitoh
DOI:10.1246/bcsj.72.1597
日期:1999.7
The electrophilic addition reactions of norbornadiene-fused furans, pyrroles, and thiophenes with bromine, arenesulfenyl chlorides, or a triazoledione generally afforded skeletally rearranged adducts except for a dibenzoyl-substituted thiophene. The formations of the adducts are attributable to the neighboring group participation by five-membered heteroaromatic rings, accompanied by the formations
降冰片二烯稠合的呋喃、吡咯和噻吩与溴、芳烃亚磺酰氯或三唑二酮的亲电加成反应通常提供骨架重排的加合物,但二苯甲酰基取代的噻吩除外。加合物的形成归因于五元杂芳环的相邻基团参与,伴随着桥连杂芳烃离子的形成和随后的 Wagner-Meewein 型骨架重排。