Metal-free synthesis of guanidinesfrom thioureas under visible-light irradiation in water was successfully developed. Using 1–5 mol% of inexpensive and commercially available phenazine ethosulfate as a photocatalyst in the presence of 1 wt% cetyltrimethylammonium bromide (CTAB) as surfactant with K2CO3 as an additive base, transformations of a variety of thioureas into the corresponding guanidines under
成功开发了在水中可见光照射下从硫脲中无金属合成胍类化合物。使用 1-5 mol% 廉价且可商购的吩嗪乙硫酸盐作为光催化剂,在 1 wt% 十六烷基三甲基溴化铵 (CTAB) 作为表面活性剂的情况下,以 K 2 CO 3作为添加基,将各种硫脲转化为相应的胍在可见光照射下可获得中高产率。该反应的优点包括使用无金属光催化剂、水作为无毒溶剂以及易于在室温下以开瓶方式操作。