已开发了在存在石墨化碳氮化物(gC 3 N 4)的情况下,进行甲硅烷基胺和α-氨基酸的光氧化活化的方案,以进行脱甲硅基和脱羧的加成,烯丙基化和杂芳基化。该方法具有广泛的范围,并以高收率提供了所需的产品。gC 3 N 4催化系统的非均质性质使其易于回收和循环利用,并且可以多次使用而不会损失活性。光氧化还原催化的反应也可以以连续的光流方式进行并按比例放大至克级。因此,稳定且容易获得的聚合物gC 3 N 4 提供了均相光敏剂的替代品,用于生成有价值的自由基中间体,用于合成和催化。
Visible-light-mediated addition of alpha-aminoalkyl radicals generated from alpha-silylamines to alpha,beta-unsaturated carbonylcompounds using a photoredox catalyst is developed. We also succeeded in the isolation of a silyl enol ether as a primary product of the photochemical reaction.
addition of amines and alkenes using metal-free conditions. Benzophenone was added as a photosensitizer to accelerate the single electron transfers, H-atom transfers and generation of α-aminoalkyl radicals. N-Alkyl anilines were alkylated with high selectivity and broad substrate scope.