6-(2-(4-bromophenyl)-2-oxoethylcarbamoyl)-4-oxohexahydropyrrolo[1,2-a]pyrazine-2-carboxylic acid methyl ester 在
ammonium acetate 作用下,
以
xylene 为溶剂,
反应 1.0h,
以60%的产率得到6-(5-(4-bromophenyl)-1H-imidazol-2-yl)-4-oxohexahydropyrrolo[1,2-a]pyrazine-2-carboxylic acid methyl ester