Phosphane-Catalyzed [4+2] Annulation of Allenoates with Ketimines: Synthesis of Sultam-Fused Tetrahydropyridines
作者:Xiang-Yu Chen、Song Ye
DOI:10.1002/ejoc.201200747
日期:2012.10
Cyclic ketimines were successfully used as electrophiles in phosphane-catalyzed [4+2] annulation reactions with ethyl 2-methyl-2,3-butadienoate to give the corresponding highly substituted tetrahydropyridine derivatives in moderate to good yields (55–73 %), and with moderate to excellent regioselectivity.