Reaction of Isoquinolin-1(2H)-Ones with Methylenecyclopropanes via Rhodium(III)-Catalyzed C-H Activation

Herein, we report a Rh(III)-catalyzed 1,3-dienylation of isoquinolin-1(2H)-ones through C-H activation. The present reaction enables the preparation of 3-(buta-1,3-dien-2-yl)isoquinolin-1(2H)-ones through the direct cross-coupling reaction of readily available isoquinolin-1(2H)-ones with methylenecyclopropanes, while tolerating many sensitive functional groups. Therefore, this method provides an efficient and convenient approach for modification of interesting molecules.