Various acyclic α-bromo enones 2 as well as cyclic α-bromo enones 4 can be prepared from the corresponding acyclic enones 1 and cyclic enones 3 respectively, in a one-pot procedure by employing organic ammonium tribromide, such as cetyltrimethylammonium tribromide (CetTMATB) or tetrabutylammonium tribromide (TBATB) in presence of K2CO3 in dichloromethane at 0 °C to room temperature under very mild
通过使用有机三
溴化铵,例如
十六烷基三甲基三
溴化铵 (CetTMATB),可以从相应的无环烯酮 1 和环烯酮 3 分别以一锅法制备各种无环 α-
溴烯酮 2 和环状 α-
溴烯酮 4或
四丁基三溴化铵 (TBATB) 在
二氯甲烷中的 K2CO3 存在下,在 0 °C 至室温下,在非常温和的条件下以良好的收率。 2