A variety of 2-substituted 5-alkynyl-1H-imidazoles were easily prepared by a one-pot sequential procedure involving a highly regioselective electrophilic C-5 bromination of 1,2-dimethyl-1H-imidazole, 2-chloro-1-methyl-1H-imidazole, and 2-aryl-1-methyl-1H-imidazoles, followed by an efficient palladium/copper co-catalyzed Sonogashira-type alkynylation.
可通过一锅顺序程序轻松制备各种2取代的5-炔基-1 H-
咪唑,该程序涉及1,2-二甲基-1 H-
咪唑,2-
氯-1的高度区域选择性亲电C-5
溴化反应-甲基-1 H-
咪唑和2-芳基-1-甲基-1 H-
咪唑,然后进行有效的
钯/
铜共催化的Sonogashira型炔基化反应。