作者:Pierre Garcia、Yannick Evanno、Pascal George、Mireille Sevrin、Gino Ricci、Max Malacria、Corinne Aubert、Vincent Gandon
DOI:10.1021/ol200417p
日期:2011.4.15
Bimolecular cobalt-catalyzed [2 + 2 + 2] cycloadditions between yne-ynamides and nitriles afford bicyclic 3- or 4-aminopyridines in up to 100% yield. The high regioselectivity observed depends on the substitution pattern at the starting ynamide. Aminopyridines bearing TMS and Ts groups are efficiently deprotected in an orthogonal fashion.