Hydrochloric Acid → N-[5-[2-(3,5-Dimethoxyphenyl)ethyl]-1H-pyrazol-3-yl]-5-piperazin-1-yl-thiophene-2-carboxamide

HRID 16743

Reaction equation

HRID 16743 reaction equation
CC(OC([N:8]1[CH2:13][CH2:12][N:11]([C:14]2[S:18][C:17]([C:19]([OH:21])=O)=[CH:16][CH:15]=2)[CH2:10][CH2:9]1)=O)(C)C.ClC(N(C)C)=C(C)C.[NH2:30][C:31]1[N:35](C(OC(C)(C)C)=O)[N:34]=[C:33]([CH2:43][CH2:44][C:45]2[CH:50]=[C:49]([O:51][CH3:52])[CH:48]=[C:47]([O:53][CH3:54])[CH:46]=2)[CH:32]=1.Cl.O1CCOCC1>C1COCC1.N1C=CC=CC=1>[CH3:52][O:51][C:49]1[CH:50]=[C:45]([CH2:44][CH2:43][C:33]2[NH:34][N:35]=[C:31]([NH:30][C:19]([C:17]3[S:18][C:14]([N:11]4[CH2:10][CH2:9][NH:8][CH2:13][CH2:12]4)=[CH:15][CH:16]=3)=[O:21])[CH:32]=2)[CH:46]=[C:47]([O:53][CH3:54])[CH:48]=1

Participants

8

Reactant 5

HCID 313Hydrochloric AcidHCID 312751,4-DioxaneHCID 6407921-Chloro-N,N-2-trimethylpropenylamineHCID 543134535-{4-[(Tert-butoxy)carbonyl]piperazin-1-yl}thiophene-2-carboxylic acidHCID 57440371Tert-butyl 5-amino-3-[2-(3,5-dimethoxyphenyl)ethyl]pyrazole-1-carboxylate

Product 1

HCID 66589690N-[5-[2-(3,5-Dimethoxyphenyl)ethyl]-1H-pyrazol-3-yl]-5-piperazin-1-yl-thiophene-2-carboxamideYield 13.5%

Reagents, catalysts & solvents 2

HCID 1049PyridineSolventHCID 8028TetrahydrofuranSolvent

Procedure

5-[4-[(2-methylpropan-2-yl)oxycarbonyl]piperazin-1-yl]thiophene-2-carboxylic acid (150 mg, mmol) was dissolved in dry THF (10 ml) under nitrogen, 1-chloro-N,N,2-trimethyl-prop-1-en-1-amine (177 μl, mmol) was added and the mixture was stirred at room temperature for 3.5 h. Tert-butyl 5-amino-3-[2-(3,5-dimethoxyphenyl)ethyl]pyrazole-1-carboxylate (167 mg, mmol) and pyridine (47 μl, mmol) were added and the reaction was heated to 65° C. for 18 h. The reaction mixture was then cooled to room temperature and 4M HCl in dioxane (2.0 ml, 2.0 mmol) added. The mixture was stirred overnight at room temperature, evaporated and the residue was purified by acidic prep. HPLC, eluting with a gradient of 24-32% MeCN in 0.1% TFA in water. The clean fractions were taken and evaporated to give the title compound as a pale green solid (28.7 mg, 11%); 1H NMR (399.902 MHz, DMSO) δ 2.79 (s, 4H), 3.21 (s, 4H), 3.34 (s, 4H), 3.64 (s, 6H), 6.29 (m, 5H), 7.77 (m, 1H), 8.71 (s, 1H), 10.37 (s, 1H) MS: m/z=442 (MH+)

Workup

  1. temperaturethe reaction was heated to 65° C. for 18 h
  2. temperatureThe reaction mixture was then cooled to room temperature
  3. stirringThe mixture was stirred overnight at room temperature
  4. customevaporated
  5. customthe residue was purified by acidic prep
  6. washHPLC, eluting with a gradient of 24-32% MeCN in 0.1% TFA in water
  7. customevaporated

Sources & evidence

ORD record
ord-e0fc0167b5fc4fde8ce6d5a01db439a0
Source dataset
uspto-grants-2010_06
Patent number
US07737149B2

Linked notes

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