preparation of N,N′-diarylhydrazides, especially from readily available raw materials, remains highly challenging. Here, a photoredox catalytic phosphine-mediated deoxygenative hydroacylation of azobenzenes with abundant and readily available carboxylic acids has been developed. With Ir[dF(CF3)ppy]2(dtbbpy)PF6 as the photocatalyst, the reactions proceeded smoothly in the presence of PPh3 under visible light
N , N'-二芳基酰
肼的方便、精确制备,特别是从容易获得的原材料中制备,仍然具有很大的挑战性。在这里,开发了一种光氧化还原催化膦介导的
偶氮苯与丰富且容易获得的
羧酸的脱氧加氢酰化反应。以Ir[dF(CF 3 )ppy] 2 (dtbbpy)PF 6为光催化剂,在PPh 3存在下,可见光照射下反应顺利进行,生成各种N , N'-二芳基酰
肼,收率高达92%。机理研究表明,该反应通过光氧化还原催化和正膦基介导的
羧酸 C-O 键断裂进行。