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

HRID 270904Notes

Reaction equation

HRID 270904 reaction equation
[CH2:1]([O:3][C:4]([C:6]1[NH:7][N:8]=[C:9]([C:11]2[S:12][CH:13]=[CH:14][CH:15]=2)[CH:10]=1)=[O:5])[CH3:2].C([O-])([O-])=O.[K+].[K+].Cl[CH2:23][C:24]([N:26]1[CH2:31][CH2:30][N:29]([C:32]2[CH:37]=[CH:36][C:35]([Cl:38])=[CH:34][CH:33]=2)[CH2:28][CH2:27]1)=[O:25].CN(C=O)C>CCCCCC.C(OCC)(=O)C>[CH2:1]([O:3][C:4]([C:6]1[N:7]([CH2:23][C:24]([N:26]2[CH2:27][CH2:28][N:29]([C:32]3[CH:37]=[CH:36][C:35]([Cl:38])=[CH:34][CH:33]=3)[CH2:30][CH2:31]2)=[O:25])[N:8]=[C:9]([C:11]2[S:12][CH:13]=[CH:14][CH:15]=2)[CH:10]=1)=[O:5])[CH3:2]

Participants

6

Reactant 4

HCID 6228DimethylformamideHCID 11430Potassium CarbonateHCID 40539571-(Chloroacetyl)-4-(4-chlorophenyl)piperazineHCID 178468642HCID 178468642, compound

Product 1

HCID 587780442-(2-[4-(4-Chloro-phenyl)-piperazin-1-yl]-2-oxo-ethyl)-5-thiophen-2-yl-2H-pyrazole-3-carboxylic acid ethyl ester

Reagents, catalysts & solvents 1

HCID 21226206Ethyl acetate hexaneSolvent

Procedure

Protocol T was followed using 5-Thiophen-2-yl-2H-pyrazole-3-carboxylic acid ethyl ester, K2CO3, 2-Chloro-1-[4-(4-Chloro-phenyl)-piperazin-1-yl]-ethanone and DMF. Column chromatography using a solvent mixture (hexane/ethyl acetate=1.5/1) afforded the title compound. 1H NMR (400 MHz, CDCl3): 7.34-7.38 (m, 1H), 7.24-7.26 (m, 1H), 7.12 (s, 1H), 7.04-7.08 (dd, 1H), 6.96-7.2 (m, 2H), 6.88-6.94 (m, 2H), 4.32-4.42 (q, 2H), 3.52-3.58 (m, 4H), 3.05-3.35 (m, 4H), 1.32-1.42 (m, 3H). 13C NMR (400 MHz, CDCl3): 164.2, 128, 126.8, 126.6, 120.2, 118.4, 115.2, 62.5, 54.2, 50.5, 42.6, 44, 14.6.

Sources & evidence

ORD record
ord-4e789734952245a79263e9a9e8257c69
Source dataset
uspto-grants-2008_11
Patent number
US07449576B1

Reaction notes

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