A Concise and Versatile Double-Cyclization Strategy for the Highly Stereoselective Synthesis and Arylative Dimerization of Aspidosperma Alkaloids
作者:Jonathan William Medley、Mohammad Movassaghi
DOI:10.1002/anie.201200387
日期:2012.5.7
Building cycles: A strategy for the concise, stereoselective synthesis of aspidosperma alkaloids and related structures via a common putative diiminium ion intermediate is reported. The approach enables the dimerization of aspidosperma‐type structures at the sterically hindered C2 position. The intermediate is prepared in one step from the shown lactam through an electrophilic double‐cyclization cascade
Total Synthesis of (±)-1-Acetylaspidoalbidine and (±)-1-Methylaspidospermidine
作者:Jian Jin、Fayang G. Qiu
DOI:10.1002/adsc.201300756
日期:2014.2.10
Abstract(±)‐1‐Acetylaspidoalbidine and (±)‐1‐methylaspidospermidine were synthesized from protected tryptamine through the combination of an organocatalytic Diels–Alder reaction, a tandem stereoselective ring‐opening reduction, and a double Michael addition.magnified image