Ethyl bromoacetate → ethyl 4-phenyl-1H-pyrazole-1-acetate

Reaktionsgleichung

[H-].[Na+].[C:3]1([C:9]2[CH:10]=[N:11][NH:12][CH:13]=2)[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.Br[CH2:15][C:16]([O:18][CH2:19][CH3:20])=[O:17]>CN(C=O)C>[C:3]1([C:9]2[CH:10]=[N:11][N:12]([CH2:15][C:16]([O:18][CH2:19][CH3:20])=[O:17])[CH:13]=2)[CH:4]=[CH:5][CH:6]=[CH:7][CH:8]=1

Komponenten

Versuchsvorschrift

To a slurry of 3.0g (0.075 mol) of sodium hydride in 30 mL of DMF at room temperature was added 10g (0.069 mol) of 4-phenyl-1H-pyrazole of example 1. The mixture was stirred 1 hr and 7.8 mL (0.07 mol) of ethyl bromoacetate was added with cooling. The reaction was stirred 3 hr at room temperature, briefly at 100° C. and was poured onto ice. The product was filtered off, rinsed with water, dried, and washed with hexane to yield 14.0g of ethyl 4-phenyl-1H-pyrazole-1-acetate.