作者:Simon Pichette、Samuel Aubert-Nicol、Jean Lessard、Claude Spino
DOI:10.1021/jo3023507
日期:2012.12.21
can undergo a thermal ring contraction after an in situ triflation. High yields of ring-contraction products are obtained with DBU when the migrating carbon is a methylene, while best results are obtained with Et3N for the migration of quaternary carbons. In some cases, the regiochemical outcome of the reaction can be controlled by changing the base. This novel thermal rearrangement complements a similar
环状异羟肟酸在原位三氟甲磺酸酯化作用后会发生热环收缩。当迁移的碳是亚甲基时,用DBU获得高收率的缩环产物,而用Et 3 N迁移季碳则获得最佳结果。在某些情况下,可以通过改变碱来控制反应的区域化学结果。该新颖的热重排补充了N-甲磺酰氧基内酰胺的类似但光化学重排。