5a-acetyl-6a-ethoxycarbonyl-5a,6a-dihydro-6H-cyclopropapyrazolo<1,5-a>pyrimidine-3-carbonitrile 在
palladium on activated charcoal
氢气 作用下,
以
1,4-二氧六环 为溶剂,
反应 4.0h,
以51.6%的产率得到Ethyl 6-acetyl-3-cyano-4,7-dihydro-7-methylpyrazolo<1,5-a>pyrimidine-7-carboxylate