A new approach to carbazoles and benzannulated carbazoles by means of intramolecular dehydro Diels–Alder of ynamides is reported. N-(o-Ethynyl)aryl ynamides and N-(o-ethynyl) arylynamides were prepared in a few steps starting from o-iodoaniline. Thermal cycloaddition of N-(o-ethynyl)aryl ynamides and N-(o-ethynyl) arylynamides affords carbazoles and benzannulated and heteroannulated carbazoles in moderate-to-good
报道了一种通过分子内脱氢狄尔斯-乙酰胺酰胺合成
咔唑和苯并二甲基
咔唑的新方法。N-(邻
乙炔基)芳基酰胺和N-(邻
乙炔基)芳基酰胺是从邻
碘苯胺开始的几个步骤中制备的。的热环加成ñ - (ø -
乙炔基)芳基ynamides和ñ - (ø -
乙炔基)arylynamides得到在中度至良好的产率
咔唑和苯基环化和heteroannulated
咔唑。