An efficient synthesis of benzothiazole using tetrabromomethane as a halogen bond donor catalyst
作者:Imran Kazi、Govindasamy Sekar
DOI:10.1039/c9ob02125f
日期:——
developed for the synthesis of 2-substituted benzothiazole under solvent- and metal-free conditions using CBr4 as the catalyst. This process involves the activation of a thioamide through halogen bond formation between the sulphur atom of the thioamide and bromine atom of the CBr4 molecule. The presence of halogen-bonding interaction between N-methylthioamides and tetrabromomethane has been demonstrated
已经开发出一种有效且温和的方案,用于使用CBr 4作为催化剂在无溶剂和无金属条件下合成2-取代的苯并噻唑。该过程涉及通过在硫代酰胺的硫原子和CBr 4分子的溴原子之间形成卤素键来活化硫代酰胺。通过一些对照实验,光谱分析和密度泛函理论(DFT)证明了N-甲基硫代酰胺和四溴甲烷之间存在卤素键相互作用。该方法对于2-烷基和2-芳基取代的苯并噻唑的合成具有广泛的底物范围。