Titanium(IV) Chloride-Mediated Ring Cleavage and Michael Addition of 3,3-Dialkylcyclobutanones and 3-[(Trimethylsilyl)methyl]-cyclobutanones
作者:Ryosuke Okuno、Jun-ichi Matsuo、Hiroyuki Ishibashi
DOI:10.1248/cpb.60.793
日期:——
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。