A One-Pot Direct Iodination of the Fischer–Borsche Ring Using Molecular Iodine and Its Utility in the Synthesis of 6-Oxygenated Carbazole Alkaloids
作者:Mahavir S. Naykode、Vivek T. Humne、Pradeep D. Lokhande
DOI:10.1021/jo5025128
日期:2015.2.20
An efficient regioselective iodination of the Fischer–Borsche ring has been achieved using molecular iodine, in a one-pot synthesis. The acid-, metal-, and oxidant-free conditions of the present method are highly convenient and practical. Furthermore, the one-pot direct iodination process is extended to the concise synthesis of glycozoline, 3-formyl-6-methoxy-carbazole, and 6-methoxy-carbazole-3-methylcarboxylate
在单锅合成中,使用分子碘可以实现费歇尔-保时捷环的有效区域选择性碘化。本方法的无酸,无金属和无氧化剂条件非常方便和实用。此外,一锅直接碘化工艺扩展到了糖唑啉,3-甲酰基-6-甲氧基咔唑和6-甲氧基咔唑-3-甲基羧酸盐天然生物碱的简明合成。事实证明,该方法可耐受多种官能团,并具有良好或优异的收率。