Sequential 1,2-Addition-Electrocyclic Ring Closures Involving Acyclic alpha,beta-Unsaturated Iminiums: A Formal [3 + 3] Cycloaddition Strategy to Unique Pyranyl Spirocycles.
Hsung
Richard P.
RP
Department of Chemistry, The University of Minnesota, Minneapolis, Minnesota 55455.
Shen
Hong C.
HC
Douglas
Christopher J.
CJ
Morgan
Christopher D.
CD
Degen
Shane J.
SJ
Yao
Letitia J.
LJ