Development of a Protocol for Eight- and Nine-Membered Ring Synthesis in the Annulation of sp<sup>2</sup>,sp<sup>3</sup>-Hybridized Organic Dihalides with Keto Esters
作者:Gary A. Molander、Christoph Köllner
DOI:10.1021/jo001195w
日期:2000.12.1
eight- and nine-membered carbocycles. In this process wherein one alkenyl- or arylbromide and a tethered alkyl chloride comprise the organic dihalide, a selective metal-halogen exchange reaction between the sp(2)-hybridized bromide and an organolithium initiates the process. Transmetalation to an organoytterbium reagent generates a species that undergoes selective carbonyl addition to the ketone of