An efficient method for the synthesis of substituted 1(2H)-isoquinolone derivatives via nickel-catalyzed annulation of substituted 2-halobenzamides with alkynes is described. This protocol is successfully applied to the total synthesis of oxyavicine with excellent yield.
A cobalt-catalyzed C-H annulation of N-aroylpicolinamides with alkynes has been developed for the construction of (NH)-isoquinolone scaffolds. The reaction employs picolinamide as a tracelessdirectinggroup and provides a facile and straightforward approach to access various (NH)-isoquinolone derivatives in good yields.