Bromoethyl 2(H) quinolinone was synthesized by the acylation of aniline with biketene in toluene, the bromination in chloroform, and the cyclization in sulfuric acid.

• 以苯胺为原料,经双乙烯酮在甲苯中酰化得乙酰乙酰苯胺;在氯仿中溴化得溴乙酰乙酰苯胺;