Photocatalytic preparation method of quinoxaline-2, 3-diketone compound

The invention belongs to the field of compound synthesis, and particularly relates to a photocatalytic preparation method of a quinoxaline-2, 3-diketone compound, which comprises the following steps: carrying out photocatalytic reaction on a raw material solution containing a quinoxaline-2-ketone raw material, mercaptan, a photocatalyst and acetonitrile under illumination to prepare a quinoxaline-2, 3-diketone compound product; the mercaptan is C1-C4 alkyl mercaptan, and-SH in the mercaptan is connected to primary carbon or secondary carbon. According to the method, the C3 site of quinoxaline-2-ketone is hydroxylated by adopting a photocatalytic means, and further, the C3 hydroxylation photocatalytic reaction effect is synergistically improved through combined control of the mercaptan and the acetonitrile solvent. 本发明属于化合物合成领域，具体涉及一种喹喔啉-2,3-二酮类化合物的光催化制备方法，将包含喹喔啉-2-酮原料、硫醇、光催化剂、乙腈的原料溶液在光照下进行光催化反应，制得喹喔啉2,3-二酮类化合物产物；所述的硫醇为C1～C4的烷基硫醇，且其中的-SH连接在一级碳或二级碳上。本发明采用光催化手段对喹喔啉-2-酮的C3位进行羟基化，并进一步通过所述的硫醇、乙腈溶剂的联合控制，协同改善C3羟基化光催化