β′-Chloro and β′,γ′-unsaturated trichlorotitanium enolates, which were formed in situ by titanium(IV) chloride-mediated ring cleavage of 3,3-dialkylcyclobutanones and 3-[(trimethylsilyl)methyl]cyclobutanones, reacted with enones to give Michael adducts with keeping a labile β′-chloro or β′,γ′-unsaturated group.
β′-
氯和β′,γ′-不饱和的三
氯钛烯醇盐,由
四氯化钛介导的3,3-二烷基
环丁酮和3-[(三甲基
硅基)甲基]
环丁酮的环裂解反应原位生成,与烯酮反应得到保留活泼β′-
氯或β′,γ′-不饱和基团的迈克尔加合物。