o-Aminoaryl ketones undergo smooth condensation with α-methylene ketones in the presence of sulfamic acid (NH2SO3H) (SA) under mild reaction conditions to afford the corresponding polysubstituted quinolines in excellent yields. The catalyst can be recovered by simple filtration and can be recycled in subsequent reactions. The method is simple, cost-effective and environmentally benign.
在氨基磺酸(NH 2 SO 3 H)(SA)存在下,在温和的反应条件下,邻氨基芳基酮与α-亚甲基酮进行平滑缩合,以优异的收率得到相应的多取代喹啉。可以通过简单的过滤来回收催化剂,并且可以在随后的反应中将其再循环。该方法简单,具有成本效益且对环境无害。