反应详情

A solution of ethyl (E)-3-(1-methyl-5-triphenylmethylaminopyrazol-4-yl)acrylate (60 g, 137 mmol) in ethanol (700 ml) was treated with 10% palladium carbon (6.0 g) under a hydrogen atmosphere at room temperature for 3 hours. After the catalyst was filtered off, the filtrate was concentrated in vacuo. The residue was triturated with hexane and dried in vacuo to give ethyl 3-(1-methyl-5-triphenylmethylaminopyrazol-4-yl)propionate (63 g) as a colorless solid.

1. filtrationAfter the catalyst was filtered off
2. concentrationthe filtrate was concentrated in vacuo
3. customThe residue was triturated with hexane
4. customdried in vacuo