反应详情

A solution of 7.5 g (0.022 mol) of ethyl 4-(4-methoxyphenyl)-5-phenyl-1H-pyrazole-1-acetate of example 4 in 35 mL of diethylaminopropylamine was stirred on a steam bath under nitrogen for 14 hours. The diethylaminopropylamine was removed in vacuo and the residue taken up in 200 mL of ethyl acetate. The ethyl acetate solution was washed twice with water, once with brine, and dried over sodium sulfate. The solvent was removed in vacuo and the residue was distilled in a Kugelrohr at 250° C./0.1 mm to yield 6.39 g of N-[3-(diethylamino)propyl]-4-(4-methoxyphenyl)-5-phenyl-1H-pyrazole-1-acetamide as a clear viscous amber oil.

1. customThe diethylaminopropylamine was removed in vacuo
2. washThe ethyl acetate solution was washed twice with water, once with brine
3. dry with materialdried over sodium sulfate
4. customThe solvent was removed in vacuo
5. distillationthe residue was distilled in a Kugelrohr at 250° C./0.1 mm