A Simple Method for the Synthesisof 3-Arylthieno[2,3-b]pyridinesvia Iodine-Mediated Cyclization of 3-(1-Arylalkenyl)-2-[(1-phenylethyl)sul­fanyl]pyridines

3-Arylthieno[2,3-b]pyridines are synthesized in a short four-step sequence from readily available 2-bromopyridines. The final and key step of the reported method involves an iodine-mediated 5-endo cyclization of 3-(1-arylalkenyl)-2-[(1-phenylethyl)sulfanyl]pyridines.