Preparation of Crowded Olefins. Neopentylidenation of Polycycloalkanones by Wittig Dibromomethylenation Followed by Reaction with<i>tert</i>-Butyllithium
作者:George A. Olah、An-hsiang Wu
DOI:10.1055/s-1990-27042
日期:——
A novel preparation of crowded olefins by neopentylidenation of polycycloalkanes is reported. The corresponding polycycloalkanones are first converted into their dibromomethylene derivatives via carbon tetrabromide/triphenylphosphine. Subsequent treatment with tert-butyllithium affords the desired neopentylidenepolycycloalkanes in good yield.
报告了一种通过多环烷烃的新戊烯化反应制备多元烯烃的新方法。首先通过四溴化碳/三苯基膦将相应的多环烷酮转化为其二溴亚甲基衍生物。随后用叔丁基锂进行处理,可以得到所需的新亚戊基多环烷,收率很高。