Nucleophilic reactions of propargyl acetates mediated by titanocene dichloride and magnesium
作者:Fanglong Yang、Gang Zhao、Yu Ding
DOI:10.1016/s0040-4039(01)00309-4
日期:2001.4
Reaction of Cp2TiCl2/Mg with propargyl acetates form allenyl titanium intermediates, which undergo nucleophilic addition reactions to aldehydes or ketones to give homopropargyl alcohols in high yields. Subsequent nucleophilic addition to acetonitrile and nucleophilic substitution with allyl bromide are also mentioned.
The generation of allenic zirconium intermediates by treating propargylic ether derivatives with ''Cp2Zr'' and their reactions with aldehydes in the presence of borontrifluoride etherate yield anti-beta-acetylenic alcohols along with alpha-allenic alcohols.