Chem Pharm Bull (Tokyo). 2022;70(11):765-768. doi: 10.1248/cpb.c22-00526.
We developed the addition reaction of α-silyl amines with benzalmalononitriles catalyzed by a Mg2+-conjugated pyrene catalyst under visible light irradiation. The catalytic activity of this complex was higher than pyrene alone, a Mg2+ Lewis acid alone, and the sum of these two independent catalytic elements. The observed enhancement in catalytic activity was likely due to electrostatic interactions of the Mg2+ Lewis acid with the pyrene radical anion, which was generated through photoinduced single electron transfer from α-silyl amines to the catalyst’s pyrene moiety.