Efficient Cu-catalyzed base-free C–S coupling under conventional and microwave heating. A simple access to S-heterocycles and sulfides
作者:Silvia M Soria-Castro、Alicia B Peñéñory
DOI:10.3762/bjoc.9.50
日期:——
yields, by using 1,10-phenanthroline as a ligand in toluene at 100 degrees C after 24 h. Under microwave irradiation the time was drastically reduced to 2 h. Both procedures are simple and involve a low-cost catalytic system. This methodology was also applied to the "one-pot" synthesis of target heterocycles, such as 3H-benzo[c][1,2]dithiol-3-one and 2-methylbenzothiazole, alkyl aryl sulfides, diaryl
S-芳基硫代乙酸盐可以通过廉价的硫代乙酸钾与富电子和缺电子的芳基碘化物在无碱铜/配体催化体系下反应制备。CuI 作为铜源,通过在 100 摄氏度的甲苯中使用 1,10-菲咯啉作为配体,24 小时后,S-芳基硫代乙酸盐以良好到优异的产率提供。在微波照射下,时间急剧减少到2小时。这两个过程都很简单,并且涉及低成本的催化系统。该方法还应用于目标杂环的“一锅法”合成,例如 3H-苯并[c][1,2]dithiol-3-one 和 2-methylbenzothiazole、烷基芳基硫化物、二芳基二硫化物和不对称二芳基硫化物收益良好。