acetyl or ester at the C-2 position of the pyrrole is tolerated. This environmentally attractive procedure has also been found to be tolerant to a very wide variety of functional groups on the aryl bromides such as formyl, acetyl, propionyl, ester, nitrile, nitro, fluoro, methoxy, amino or trifluoromethyl.
据报道,通过CH键活化,
吡咯的区域选择性C-2或C-5芳基化的简单且经济的方法。仅使用0.5-0.01 mol%的市售且无空气稳定的无
配体的
乙酸钯(II)[Pd(OAc)2 ]作为催化剂。容许在
吡咯的C-2位置存在吸电子取代基,例如甲酰基,乙酰基或酯。还已经发现这种对环境有吸引力的方法可耐受芳基
溴化物上的各种官能团,例如甲酰基,乙酰基,丙酰基,酯,腈,硝基,
氟,甲氧基,
氨基或三
氟甲基。