Synthesis of quinolines <i>via</i> sequential addition and I<sub>2</sub>-mediated desulfurative cyclization
作者:Mingming Yang、Yajun Jian、Weiqiang Zhang、Huaming Sun、Guofang Zhang、Yanyan Wang、Ziwei Gao
DOI:10.1039/d1ra06976d
日期:——
one-pot approach for the synthesis of quinolines from o-aminothiophenol and 1,3-ynone under mild conditions is disclosed. With the aid of ESI-MS analysis and parallel experiments, a three-step mechanism is proposed-a two-step Michael addition-cyclization condensation step leading to intermediate 1,5-benzothiazepine catalyzed by zirconocene amino acid complex Cp2Zr(η1-C9H10NO2)2, followed by I2-mediated
公开了一种在温和条件下从邻氨基苯硫酚和1,3-炔酮合成喹啉的有效一锅法。借助ESI-MS分析和平行实验,提出了二茂锆氨基酸配合物Cp2Zr(η1-C9H10NO2)催化两步Michael加成-环化缩合生成中间体1,5-苯并硫氮杂的三步机理。 2,然后是I2介导的脱硫步骤。