Palladium-Catalyzed CH Activation of N-Allyl Imines: Regioselective Allylic Alkylations to Deliver Substituted Aza-1,3-Dienes
作者:Barry M. Trost、Subham Mahapatra、Martin Hansen
DOI:10.1002/anie.201501322
日期:2015.5.11
mode of activation of an imine via a rare aza‐substituted π‐allyl complex is described. Palladium‐catalyzed C(sp3)H activation of the N‐allyl imine and the subsequent nucleophilic attack by the α‐alkyl cyanoester produced the 1‐aza‐1,3‐diene as the sole regioisomer. In contrast, nucleophilic attack by the α‐aryl cyanoester exclusively delivered the 2‐aza‐1,3‐diene, which was employed in an inverse‐electron‐demand
描述了一种通过稀有的氮杂取代的π-烯丙基络合物活化亚胺的新模式。钯催化的C(SP 3)小时N-烯丙基亚胺和由α-烷基氰酯后续亲核攻击的活化产生的1-氮杂环己-1,3-二烯作为唯一的区域异构体。相比之下,α-芳基氰基酸酯的亲核攻击仅释放了2-氮杂-1,3-二烯,该反丁烯二芳基化合物用于反电子需求的Diels-Alder反应中。