Dimethylformamide → 4-Chloro-2-{2-[4-(4-fluoro-phenyl)-piperazin-1-yl]-2-oxo-ethyl}-5-methyl-2H-pyrazole-3-carboxylic acid ethyl ester

HRID 270891Notes

Reaction equation

HRID 270891 reaction equation
[CH2:1]([O:3][C:4]([C:6]1[NH:7][N:8]=[C:9]([CH3:12])[C:10]=1[Cl:11])=[O:5])[CH3:2].C([O-])([O-])=O.[K+].[K+].Cl[CH2:20][C:21]([N:23]1[CH2:28][CH2:27][N:26]([C:29]2[CH:34]=[CH:33][C:32]([F:35])=[CH:31][CH:30]=2)[CH2:25][CH2:24]1)=[O:22].CN(C=O)C>CCCCCC.C(OCC)(=O)C>[CH2:1]([O:3][C:4]([C:6]1[N:7]([CH2:20][C:21]([N:23]2[CH2:24][CH2:25][N:26]([C:29]3[CH:34]=[CH:33][C:32]([F:35])=[CH:31][CH:30]=3)[CH2:27][CH2:28]2)=[O:22])[N:8]=[C:9]([CH3:12])[C:10]=1[Cl:11])=[O:5])[CH3:2]

Participants

6

Reactant 4

HCID 6228DimethylformamideHCID 11430Potassium CarbonateHCID 18485111-(Chloroacetyl)-4-(4-fluorophenyl)piperazineHCID 178470422HCID 178470422, compound

Product 1

HCID 587780324-Chloro-2-{2-[4-(4-fluoro-phenyl)-piperazin-1-yl]-2-oxo-ethyl}-5-methyl-2H-pyrazole-3-carboxylic acid ethyl ester

Reagents, catalysts & solvents 1

HCID 21226206Ethyl acetate hexaneSolvent

Procedure

Protocol T was followed using 4-Chloro-5-methyl-2H-pyrazole-3-carboxylic acid ethyl ester, K2CO3, 2-Chloro-1-[4-(4-fluoro-phenyl)-piperazin-1-yl]-ethanone and DMF. Column chromatography using a solvent mixture (hexane/ethyl acetate=2/3) afforded the title compound as a white solid. 1H NMR (400 MHz, CDCl3): 6.94-7.1 (m, 2H), 6.84-6.88 (dd, 2H), 5.04 (s, 2H), 4.38-4.44 (q, 2H), 3.62-3.80 (m, 4H), 3.02-3.14 (m, 4H), 2.3 (s, 3H), 1.36-1.42 (t, 3H). 13C NMR (400 MHz, CDCl3): 182, 165, 119, 116.2, 116, 61.4, 52.3, 51, 50.8, 45.8, 42.6, 14.4, 10.

Sources & evidence

ORD record
ord-e5179ee283f54ea7a792e02d4cad1b57
Source dataset
uspto-grants-2008_11
Patent number
US07449576B1

Reaction notes

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