Stereoselective synthesis of constrained norbornane-derived spiro-β-lactams
作者:Giuseppe Cremonesi、Piero Dalla Croce、Alessandra Forni、Concetta La Rosa
DOI:10.1016/j.tet.2012.11.048
日期:2013.1
New enantiopure polycyclic norbornane-derived spiro-β-lactams were synthesized by means of a Staudinger ketene–imine reaction between unsymmetricalbicyclic chiral ketenes, generated from differently substituted norbornane carboxylic acids, and (E)-N-benzyl-N-(phenylmethylene)amine, with high yields and moderate to good stereoselectivities. The diastereoisomeric results were rationalized taking into