Organozinc Generation via the Titanium-Catalyzed Activation of Alkyl Halides
作者:Lauren M. Fleury、Brandon L. Ashfeld
DOI:10.1021/ol902374v
日期:2009.12.17
A protocol for the generation of organozinc reagents via catalytic activation of alkyl halides is described herein. Subsequent nucleophilic addition to carbonyl derivatives provided the desired products in good to excellent yields (76-99%). Evidence suggests that titanocene dichloride catalyzes the formation of an organozinc species. This discovery will have wide ranging applicability in the generation of highly reactive organometallic reagents.
First Studies of the Transition Metal-Catalyzed [5+2] Cycloadditions of Alkenes and Vinylcyclopropanes: Scope and Stereochemistry
作者:Paul A. Wender、Craig O. Husfeld、Elke Langkopf、Jennifer A. Love