Multibromo-N-alkylcarbazoles: synthesis, characterization, and their benzo[b]thiophene derivatives

作者：Pansay Sukrawee; Prachumrak Narid; Jungsuttiwong Siri****; Keawin Tinnagon; Sudyoadsuk Taweesak; Promarak Vinich^*

来源：Tetrahedron Letters, 2012, 53(34): 4568-4572.

DOI：10.1016/j.tetlet.2012.06.067

• Carbazole
• Bromocarbazole
• Bromination
• Thianaphthene
• Organic light-emitting diode

We present an efficient method for the selective bromination of N-alkylcarbazoles using N-bromosuccinimide (NBS) in THF. Four brominated N-alkylcarbazoles including 3-bromo-, 3,6-dibromo-, 1,3,6-tribromo- and 1,3,6,8-tetrabromo-carbazoles were prepared and identified by H-1 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.

• 出版日期2012-8-22