Copper-Catalyzed Stereoselective Hydroarylation of 3-Aryl-2- propynenitriles with Arylboronic Acids
作者:Yoshihiko Yamamoto、Tsuyoshi Asatani、Naohiro Kirai
DOI:10.1002/adsc.200900067
日期:2009.6
Abstractmagnified imageThe selective synthesis of 3,3‐diarylacrylonitriles has been achieved by copper‐catalyzed hydroarylation of 3‐aryl‐2‐propynenitriles with arylboronic acids. The starting cyanoalkynes were efficiently prepared from the appropriate aromatic aldehydes and diethyl cyanomethylphosphonate in two steps. The hydroarylation of the obtained cyanoalkyne substrates proceeded in methanol at ambient temperature to produce 3,3‐diarylacrylonitriles in good to high yields with excellent syn selectivity. The present method was successfully applied to the regiospecific synthesis of both stereoisomers of CC‐5079, which was recently reported as a potent anticancer drug.