Stereocontrolled synthesis of azeto[2,1-b] quinazolines bearing three stereocenters via the intramolecular [2+2] cycloaddition between ketenimines and imines
作者:Mateo Alajarı́n、Angel Vidal、Fulgencio Tovar、M.Carmen Ramı́rez de Arellano
DOI:10.1016/j.tetasy.2003.11.025
日期:2004.2
A highly stereoselective synthesis of azeto[2,1-b]quinazolines bearing three stereocenters (C1, C2, and C8) has been achieved via intramolecular [2+2] cycloaddition between ketenimine and iminefunctions supported on an ortho-benzylic scaffold. An asymmetric center adjacent to the iminic nitrogen atom, the future C8 carbon of the bicyclic product, efficiently controls the absolute configuration of