Cycloadditions of 2-Azaallyllithium Species with Conjugated Polyenes
作者:William H. Pearson、Douglas M. Mans、Jeff W. Kampf
DOI:10.1021/jo030306z
日期:2004.2.1
OMe] were generated by tin−lithium exchange of (2-azaallyl)stannanes and underwent [π4s+π2s] and [π6s+π4s] cycloadditions with cyclic dienes and trienes, respectively, to generate novel bridged azabicyclic compounds in a highly diastereoselective endo fashion. The periselectivity using cycloheptatriene was modest, producing a 1:1 mixture of [π6s+π4s] and [π4s+π2s] adducts. The reactions of 2-azaallyllithium