A Novel and Highly Stereoselective Intramolecular Formal [3+3] Cycloaddition Reaction of Vinylogous Amides Tethered withα,β-Unsaturated Aldehydes: A Formal Total Synthesis of (+)-Gephyrotoxin
作者:Lin-Li Wei、Richard P. Hsung、Heather M. Sklenicka、Aleksey I. Gerasyuto
Complex piperidinyl heterocycles (for example, 2) were accessed by using a novel intramolecular formal [3+3] cycloadditionreaction of vinylogous amides tethered with enals (for example, 1). This method has been applied to a formal total synthesis of (+)-gephyrotoxin (3).
An enantioselective formal synthesis of (+)-gephyrotoxin 287C
作者:Mark L. Trudell、Lei Miao、Hong Shu、April R. Noble、Steven P. Fournet、Edwin D. Stevens
DOI:10.3998/ark.5550190.0011.402
日期:——
synthesized via an enantioselective serial sequence involving nine discrete steps that furnished Kishi’s intermediate 5 in 22% overall yield. This efficient and expeditious synthetic approach exploits the inherent stereochemistry of a (1R)-2-tropinone derivative for the construction of the core cis-2,5disubstituted pyrrolidine ring system and constitutes a formal synthesis of gephyrotoxin 287C.