Visible Light Photocatalytic Aerobic Oxygenation of Indoles and pH as a Chemoselective Switch
作者:Chenhao Zhang、Sanliang Li、Filip Bureš、Richmond Lee、Xinyi Ye、Zhiyong Jiang
DOI:10.1021/acscatal.6b01969
日期:2016.10.7
d chromophore (DPZ) photocatalyst, aerobic photooxygenation of indoles could produce either isatins or formylformanilides in satisfactory yields by judiciously selecting inorganic salts or modulating the reaction pH. The current chemodivergent method is also effective with 2-substituted indoles, opening straightforward synthetic routes to valuable 2,2-disubstituted 3-oxindoles, formylformanilide derivatives
开发了一种有效的化学发散策略,用于可见光光催化。在二氰基吡嗪衍生的生色团(DPZ)光催化剂的存在下,通过明智地选择无机盐或调节反应pH,吲哚的需氧光氧化可产生令人满意的产率的靛红或甲酰甲酰苯胺。当前的化学发散方法对于2-取代的吲哚也是有效的,为有价值的2,2-二取代的3-氧吲哚,甲酰基甲酰苯胺衍生物和苯并恶嗪酮开辟了直接的合成路线。涉及循环伏安法研究的机理研究进一步证实,反应pH值会影响DPZ的电化学性能,从而影响吲哚被转化的氧化途径。