Cobalt (II) complexes of porphyrins are effective catalysts for intramolecular nitrene insertion of C—H bonds with arylsulfonyl azides. The cobalt-catalyzed process can proceed efficiently under mild and neutral conditions in low catalyst loading without the need of other reagents or additives, generating nitrogen gas as the only byproduct. Using the simple tetraphenylporphyrin (TPP) as the ligand, the cobalt-catalyzed intramolecular amidation can be applied to primary, secondary, and tertiary C—H bonds and suitable for a broad range of arylsulfonyl azides, leading to the syntheses of various benzosultam derivatives in excellent yields
卟啉的
钴(II)配合物是有效的催化剂,可用于芳基磺酰
叠氮化物对C—H键的分子内插入反应。在低催化剂负载下,
钴催化的过程可以在温和和中性条件下高效进行,无需其他试剂或添加剂,生成氮气作为唯一副产物。使用简单的
四苯基卟啉(
TPP)作为
配体,
钴催化的分子内酰胺化反应可应用于一次、二次和三次C—H键,并适用于广泛范围的芳基磺酰
叠氮化物,从而合成各种苯并磺酰胺衍
生物,收率优异。