Asymmetric Cascade Reaction to Allylic Sulfonamides from Allylic Alcohols by Palladium(II)/Base-Catalyzed Rearrangement of Allylic Carbamates
作者:Johannes Moritz Bauer、Wolfgang Frey、René Peters
DOI:10.1002/anie.201403090
日期:2014.7.14
accessible achiral allylic alcohols into chiral sulfonyl‐protected allylic amines. The reaction is catalyzed by the cooperative action of a chiral ferrocene palladacycle and a tertiary amine base and combines high step‐economy with operational simplicity (e.g. no need for inert‐gas atmosphere or catalyst activation). Mechanistic studies support a PdII‐catalyzed [3,3] rearrangement of allylic carbamates—generated
据报道,区域和对映选择性串联反应能够将容易获得的非手性烯丙基醇转化为手性磺酰基保护的烯丙基胺。该反应由手性二茂铁Palladacycle和叔胺碱的协同作用催化,并结合了高阶经济性和操作简便性(例如,不需要惰性气体气氛或催化剂活化)。机理研究支持Pd II催化的[3,3]烯丙基氨基甲酸酯重排反应(这是从烯丙基醇和异氰酸酯中原位生成的),这是关键步骤,随后是脱羧反应。