4-(2-oxo-1,2,4,5-tetrahydro-benzo[d][1,3]diazepin-3-yl)-piperidine-1-carboxylic acid (R)-1-carboxy-2-(8-methyl-2,3-dihydro-1,4-benzodioxin-6-yl)ethylester 、
1-甲基-4-(4-哌啶基)哌嗪 在
O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate 、
三乙胺 作用下,
以
DMF (N,N-dimethyl-formamide) 为溶剂,
以57%的产率得到4-(2-oxo-1,2,4,5-tetrahydro-benzo[d][1,3]diazepin-3-yl)-piperidine-1-carboxylic acid (R)-2-oxo-2-[4-(4-methyl-piperazin-1-yl)-piperidin-1-yl]-1-(8-methyl-2,3-dihydro-1,4-benzodioxin-6-yl)ethylester