The reaction of diversely substituted α-cyclopropylketones with allyltrimethylsilane in the presence of titanium tetrachloride has been studied. The products formation is explained by the intervention of a cyclopropycarbinyl transient cation formed after a first 1,2-addition on the carbonyl. With regard to the structure of the starting compounds, this intermediate reacts with a second molecule of allylsilane
研究了在
四氯化钛存在下,不同取代的α-环丙基酮与烯丙基三甲基
硅烷的反应。产物的形成是通过在羰基上进行第一次1,2-加成后形成的环丙基羰基瞬态阳离子的干预来解释的。关于起始化合物的结构,该中间体通过在碳环上的双分子加成或通过直接攻击带有形式正电荷的碳而与烯丙基
硅烷的第二个分子反应,从而生成
二烯丙基和官能化的
环己烷衍
生物。提出了一种通用机制。