Hetero [6+3] Cycloaddition of Fulvenes with <i>N</i>-Alkylidene Glycine Esters: A Facile Synthesis of the Delavayine and Incarvillateine Framework
作者:Bor-Cherng Hong、Arun Kumar Gupta、Ming-Fun Wu、Ju-Hsiou Liao、Gene-Hsiang Lee
DOI:10.1021/ol034329b
日期:2003.5.1
[reaction: see text] In contrast to the [3+2] or [4+3] cycloaddition of N-metalated azomethine ylides and various alkenes, N-benzylidene glycine ethyl ester reacts with fulvenes to give the hetero [6+3] cycloaddition adducts with high stereoselectivity, constituting an efficient and novel route to [2]pyrindines.