Divergent Syntheses of 2-Aminonicotinonitriles and Pyrazolines by Copper-Catalyzed Cyclization of Oxime Ester
摘要:
Copper-catalyzed cyclization of an oxime ester toward divergent heterocycle synthesis is reported. Oxime ester serves as an enamine precursor to cyclize with malononitrile and aldehydes for access to 2-aminonicotinonitriles in a one-pot reaction, while cyclizing with N-sulfonylimines leads to synthesis of pyrazolines.
Divergent Syntheses of 2-Aminonicotinonitriles and Pyrazolines by Copper-Catalyzed Cyclization of Oxime Ester
作者:Qifan Wu、Yan Zhang、Sunliang Cui
DOI:10.1021/ol500094w
日期:2014.3.7
Copper-catalyzed cyclization of an oxime ester toward divergent heterocycle synthesis is reported. Oxime ester serves as an enamine precursor to cyclize with malononitrile and aldehydes for access to 2-aminonicotinonitriles in a one-pot reaction, while cyclizing with N-sulfonylimines leads to synthesis of pyrazolines.