Mechanistic Studies of the Allylic Rearrangements of α-Silyloxy Allylic Silanes to Silyloxy Vinylic Silanes
作者:Angie I. Kim、Kyle L. Kimmel、Antonio Romero、Jacqueline H. Smitrovich、K. A. Woerpel
DOI:10.1021/jo070634p
日期:2007.8.1
Mechanistic evidence suggests that the Lewis acid-promoted allylic rearrangement of α-silyloxy allylic silanes proceeds along an ionic reaction pathway involving a contact ion pair. The driving force for this transformation is alleviation of steric congestion at the allylic position of the α-silyloxy allylic silane and stabilization of πcc by hyperconjugation.
机理证据表明,路易斯酸促进的α-甲硅烷氧基烯丙基硅烷的烯丙基重排沿着涉及接触离子对的离子反应路径进行。用于该转化的驱动力是在α甲硅烷氧基烯丙基硅烷和π的稳定化的烯丙基位置空间拥塞缓解立方厘米通过超共轭。