Directed Metalation Linked to Transition Metal Catalyzed Cascade Reactions: Two Total Syntheses of Plicadin, the Alleged Coumestan fromPsoralea plicata
作者:Brian A. Chauder、Alexey V. Kalinin、Nicholas J. Taylor、Victor Snieckus
DOI:10.1002/(sici)1521-3773(19990517)38:10<1435::aid-anie1435>3.0.co;2-b
日期:1999.5.17
The oxygen-rich heterocyclic compound 1-which was proposed to be the structure of plicadin, the alleged naturally occurring coumestan from the herb Psoralea plicata-was synthesized by the rational combinations of directed ortho and remote metalation reactions with cascades of Negishi, Sonogashira, Castro-Stephens, and carbamoyl Baker-Venkataraman reactions.