Generation of allyl Grignard reagents via titanocene-catalyzed activation of allyl halides
作者:Lauren M. Fleury、Brandon L. Ashfeld
DOI:10.1016/j.tetlet.2010.02.144
日期:2010.5
A protocol for the generation of allylGrignardreagents via the catalytic activation of allyl halides is described herein. Subsequent nucleophilic addition to carbonyl derivatives provided the desired homo allylic alcohols in excellent yields (84–99%). Evidence suggests that titanocene dichloride catalyzes the formation of an allylGrignard species which reacts solely with the carbonyl electrophile
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.