Sulfite-Promoted Synthesis of <i>N</i>-Difluoromethylthioureas via the Reaction of Azoles with Bromodifluoroacetate and Elemental Sulfur
作者:Jian-Chao Deng、Yong-Chao Gao、Zhu Zhu、Li Xu、Zhao-Dong Li、Ri-Yuan Tang
DOI:10.1021/acs.orglett.8b03876
日期:2019.1.18
A sulfite-promoted transformation of azoles into N-difluoromethylthioureas through N-difluoromethylation and sulfuration has been developed. In this reaction, inexpensive ethyl bromodifluoroacetate and nontoxic elemental sulfur were used as the difluoromethylation and sulfuration reagents, respectively. A variety of azoles, including benzimidazoles, imidazoles, and triazoles, performed well to afford
已经开发了通过N-二氟甲基化和硫化作用的亚硫酸盐促进的唑转化为N-二氟甲基硫脲。在该反应中,廉价的溴二氟乙酸乙酯和无毒的元素硫分别用作二氟甲基化和硫化试剂。各种苯并咪唑,包括苯并咪唑,咪唑和三唑,表现良好,以中等至良好的收率提供了多种吡咯硫脲。