Tandem Formation and [2,3] Rearrangement of Methylene Ammonium Ylides Derived from Amines and the Simmons−Smith Reagent
作者:Varinder K. Aggarwal、Guang yu Fang、Jonathan P. H. Charmant、Graham Meek
DOI:10.1021/ol034404i
日期:2003.5.1
[reaction: see text] Zinc-complexed methylene ammonium ylides are formed from tertiary amines and the Simmons-Smith reagent. These stable entities can be activated with n-BuLi to allow reactions typical of ammonium ylides such as [2,3] rearrangements. In the case of oxazolidine 12, ylide formation, activation, and subsequent [2,3] rearrangement was highly efficient and occurred with very high diastereoselectivity
[反应:见正文]锌络合的亚甲基铵盐是由叔胺和Simmons-Smith试剂形成的。这些稳定的实体可以用n-BuLi活化,以实现典型的铵化铵反应,例如[2,3]重排。在恶唑烷12的情况下,叶立德的形成,活化和随后的[2,3]重排非常有效,并且非对映选择性很高。