An efficient procedure for the synthesis of 2-aminothiazoles via DBH-mediated oxidative cyclization of styrenes and thioureas is reported. Various alkenes were successfully transformed to the corresponding 2-aminothiazoles in yields of 10–81% via a two-step one-pot manner using DBH as both the bromine source and oxidant. The method can be readily carried out in gram-scale and successfully applied to the synthesis of anti-inflammatory drug fanetizole using styrene as starting material.

中文翻译：

---

由1,3-二溴-5,5-二甲基乙内酰脲（DBH）介导的苯乙烯衍生物合成2-氨基噻唑

据报道，通过DBH介导的苯乙烯和硫脲的氧化环化合成2-氨基噻唑的有效方法。使用DBH作为溴源和氧化剂，通过两步一锅法成功地将各种烯烃成功转化为相应的2-氨基噻唑，产率为10-81％。该方法可以容易地以克为单位进行，并且成功地用于以苯乙烯为起始原料的抗炎药fanetizole的合成。