1-benzoyl-2-bromoacetylene on Al2O3 at room temperature under base and solvent-free conditions to afford 3-(2-benzoylethynyl)indoles in 22–76% yields, thus representing the first examples of direct ethynylation of the indole nucleus.
在室温下,在碱性和无溶剂条件下,
吲哚与1-苯甲酰基-2-
溴乙炔在Al 2 O 3上交叉偶联,以22-76%的收率得到3-(2-苯甲酰基
乙炔基)
吲哚,因此是第一个实例
吲哚核的直接
乙炔化反应