Multibromo-N-alkylcarbazoles: synthesis, characterization, and their benzo[b]thiophene derivatives
作者:Sukrawee Pansay、Narid Prachumrak、Siriporn Jungsuttiwong、Tinnagon Keawin、Taweesak Sudyoadsuk、Vinich Promarak
DOI:10.1016/j.tetlet.2012.06.067
日期:2012.8
3-bromo-, 3,6-dibromo-, 1,3,6-tribromo- and 1,3,6,8-tetrabromo-carbazoles were prepared and identified by 1H NMR spectroscopy. Subsequent cross-coupling of these carbazoles with benzo[b]thien-2-ylboronic acid gave the corresponding benzo[b]thien-2-yl functionalized carbazoles in good yields.
我们提出了一种在THF中使用N-溴代琥珀酰亚胺(NBS)选择性溴化N-烷基咔唑的有效方法。制备了四个溴化的N-烷基咔唑,包括3-溴-,3,6-二溴-,1,3,6-三溴-和1,3,6,8-四溴-咔唑,并通过1 H NMR光谱鉴定。这些咔唑与苯并[ b ]噻吩-2-基硼酸的随后交叉偶联以良好的产率得到了相应的苯并[ b ]噻吩-2-基官能化的咔唑。