4-Cyan-3,3-dimethyl-5-isopropyliden-1-pyrazolin 在
2,4,6-triphenylpyrylium tetrafluoroborate 作用下,
以
乙腈 为溶剂,
反应 180.0h,
生成
3-Isopropyl-5,5-dimethyl-4,5-dihydro-1H-pyrazole-4-carbonitrile 、 3,3,4,6,6-Pentamethyl-2,6-dihydro-3H-pyrrolo[3,4-c]pyrazole-3a-carbonitrile