5-[2-ethoxy-5-(1-phenyl-3-methyl-1,3-dione-2-acetyl)phenyl]-1-methyl-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one 、
邻苯二胺 在
p-toluenesulfonic acid/silica gel 作用下,
反应 0.67h,
以83%的产率得到5-[2-ethoxy-5-(2-phenyl-4-methyl-3H-1,5-benzodiazepine-3-acetyl)phenyl]-1-methyl-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one