A Simple Method for the Synthesis of 3-Arylthieno[2,3-b]pyridines via 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. thieno[2,3-b]pyridines - iodine - 2-bromopyridines - cyclization - heterocycles
3-芳基噻吩并[2,3- b ]吡啶是由很容易获得的2-溴吡啶以短的四步序列合成的。所报道的方法的最后和关键的步骤涉及碘介导的5-内切3-(1-芳基烯基)环化-2 - [(1-苯基乙基)硫基]吡啶。 噻吩并[2,3- b ]吡啶-碘-2-溴吡啶-环化-杂环