Trichloroisocyanuric acid is found to be an efficient catalyst for the electrophilic substitution reaction of indole with aldehydes/ketones to afford the corresponding bis‐indolyl, tris‐indolyl, di(bis‐indolyl), tri(bis‐indolyl), and tetra(bis‐indolyl)methanes under solid‐state conditions by pulverization‐activation method at room temperature with excellent yields. The remarkable features of this new
发现
三氯异氰尿酸是
吲哚与醛/酮的亲电子取代反应的有效催化剂,可提供相应的双
吲哚基,三
吲哚基,二(双
吲哚基),三(双
吲哚基)和四(双在室温下通过粉碎活化法在固态条件下生成
吲哚基)
甲烷,收率很高。这种新方法的显着特征是高转化率,更短的反应时间,更干净的反应曲线以及简单的实验和后处理程序。J.杂环化学。(2010)。