Intermolecular Reaction of Internal Alkynes and Imines: Propargyl Tosylates as Key Partners in a Gold-Catalyzed [4 + 1] Unusual Cyclization Leading to Cyclopent-2-enimines
摘要:
Propargyl tosylates react with N-tosylaidimines to afford cyclopent-2-enimines in a gold-catalyzed process that involves a deep reorganization of both substrates. The formal [4 + 1] cyclization Is initiated by a 1,2-migration of the tosylate that eventually generates a substituted 1,3-diene, Subsequent Interaction with the Imine launches a series of reaction steps prior to a Nazarov-like cyclization to yield the final product.
Consecutive CH Functionalization Reactions of Arenes: Synthesis of Carbo- and Heteropolycyclic Skeletons
作者:Samuel Suárez-Pantiga、David Palomas、Eduardo Rubio、José M. González
DOI:10.1002/anie.200902989
日期:2009.10.5
Doubling the bet: Two CH bonds become functionalized upon exposure of ω‐aryl propargylic tosylates to Sc(OTf)3 (see scheme). The reaction involves a new domino process that can tolerate both electron‐withdrawing and ‐donating substituents on the arene unit. Different carbo‐ and heterocyclic frameworks can be assembled by using this approach to formally conquer the hydroarylation process.
Intermolecular Reaction of Internal Alkynes and Imines: Propargyl Tosylates as Key Partners in a Gold-Catalyzed [4 + 1] Unusual Cyclization Leading to Cyclopent-2-enimines
作者:Samuel Suárez-Pantiga、Eduardo Rubio、Carmen Alvarez-Rúa、José M. González
DOI:10.1021/ol8025523
日期:2009.1.1
Propargyl tosylates react with N-tosylaidimines to afford cyclopent-2-enimines in a gold-catalyzed process that involves a deep reorganization of both substrates. The formal [4 + 1] cyclization Is initiated by a 1,2-migration of the tosylate that eventually generates a substituted 1,3-diene, Subsequent Interaction with the Imine launches a series of reaction steps prior to a Nazarov-like cyclization to yield the final product.