1-tert-butyl-5-(4-methoxyphenyl)-3-isopropyl-6,7-dihydro-1H-pyrazolo[4,3-e][1,4]diazepin-8-one 、
三溴化硼 、
二氯甲烷 以to give 0.29 g (60%) of the expected product的产率得到3-tert-Butyl-1-ethyl-5-(4-hydroxy-phenyl)-6,7-dihydro-1H-pyrazolo[4,3-e][1,4]diazepin-8-one