A convenient method for the synthesis of substituted pyrazines from vinyl azides has been developed. This method is enabled by a dual-energy and electron-transfer strategy by visible-light photocatalysis. Initially, vinyl azides are activated by a triplet sensitization process from an excited ruthenium photocatalyst in the presence of water to form dihydropyrazines, followed by a single-electron-transfer (SET) process under oxygen (air) atmosphere that leads to the tetrasubstituted pyrazines in good to excellent yields.

中文翻译：

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利用光级联工艺从乙烯基叠氮化物可见光介导合成吡嗪

已开发出一种从乙烯基叠氮化物合成取代吡嗪的简便方法。这种方法是通过可见光光催化的双能和电子转移策略实现的。最初，乙烯基叠氮化物在水的存在下通过激发的钌光催化剂的三重敏化过程活化以形成二氢吡嗪，然后在氧气（空气）气氛下进行单电子转移（SET）过程，导致四取代的吡嗪在良好的产量。