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 allylicrearrangement 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.