α,β- β, γ-unsaturated esters can be converted by strong base and chlorotrimethylsilane to the corresponding mixed vinylketene acetals which are shown to be particularly useful and generally applicable reagents for the regiospecific annulation of halogenoquinones. The reaction proceeds readily with a variety of substrates including benzoquinones.
α,β-β,γ-不饱和酯可通过强碱和三
甲基氯硅烷转化为相应的混合
乙烯酮缩醛,这对于卤代醌的区域特异性环合而言是特别有用和普遍适用的试剂。该反应在包括苯醌在内的多种底物下容易进行。