selective and convenient synthesis of tri- and tetrasubstituted α,β-unsaturated ketones, as well as 2,3-diarylbenzofurans has been developed with the aid of light and taking advantage of a cooperative gold/photoredox-catalyzed 2-fold arylation reaction of TMS-terminated alkynols. The reaction of 3-(trimethylsilyl)prop-2-yn-1-ols was competent to generate diarylated α,β-unsaturated ketones; whereas the
利用光/
金的协同
金/光氧化还原催化的2-倍芳基化反应,开发了选择性和方便地合成三和四取代的α,β-不饱和酮以及2,3-二芳基
苯并呋喃的方法。 TMS终止的炔醇。3-(三甲基甲
硅烷基)丙-2-yn-1-醇的反应能生成二芳基化的α,β-不饱和酮。而涉及2-[((三甲基甲
硅烷基)
乙炔基]
苯酚的光氧化还原序列仅提供2,3-二芳基
苯并呋喃。末端
炔烃的反应收率很低,而使用较大的甲
硅烷基(如
TIPS)则无济于事。显然,C(sp)芳基化反应是多米诺骨牌双芳基序列上的第一个事件。