Water → 2-[4-(4-Trifluoromethoxy-benzene sulfonyl)-piperazin-1-yl]-thiazole-5-carboxylic acid methyl ester

HRID 1392940Notes

Reaction equation

HRID 1392940 reaction equation
[CH3:1][O:2][C:3]([C:5]1[S:9][C:8]([N:10]2[CH2:15][CH2:14][NH:13][CH2:12][CH2:11]2)=[N:7][CH:6]=1)=[O:4].[F:16][C:17]([F:30])([F:29])[O:18][C:19]1[CH:24]=[CH:23][C:22]([S:25](Cl)(=[O:27])=[O:26])=[CH:21][CH:20]=1.C(N(CC)CC)C.O>ClCCl>[CH3:1][O:2][C:3]([C:5]1[S:9][C:8]([N:10]2[CH2:11][CH2:12][N:13]([S:25]([C:22]3[CH:21]=[CH:20][C:19]([O:18][C:17]([F:16])([F:29])[F:30])=[CH:24][CH:23]=3)(=[O:27])=[O:26])[CH2:14][CH2:15]2)=[N:7][CH:6]=1)=[O:4]

Participants

6

Reactant 4

HCID 962WaterHCID 8471TriethylamineHCID 523102p-(Trifluoromethoxy)benzenesulphonyl chlorideHCID 22831866Methyl 2-(piperazin-1-yl)thiazole-5-carboxylate

Product 1

HCID 691992162-[4-(4-Trifluoromethoxy-benzene sulfonyl)-piperazin-1-yl]-thiazole-5-carboxylic acid methyl esterYield 78.8%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

To a solution of compound 11 (200 mg, 0.886 mmol) in dichloromethane (7.5 mL) were added 4-trifluoromethoxybenzenesulfonyl chloride (344 mg, 1.320 mmol) and triethylamine (220 mg, 2.169 mmol) under a N2 atmosphere. The reaction mixture was stirred at room temperature for 4 h. Water (10 mL) followed by dichloromethane (10 mL) were added to the reaction mixture and the organic layer was separated, dried on sodium sulfate, filtered and concentrated under reduced pressure. The residue was purified by column chromatography using silica gel to give the compound 12d as a solid (313 mg, 78.8%). HPLC: 98% (Rt=12.22 min).

Workup

  1. additionwere added to the reaction mixture
  2. customthe organic layer was separated
  3. customdried on sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by column chromatography

Sources & evidence

ORD record
ord-d85edf3e372e49d4b82d70023d87923e
Source dataset
uspto-grants-2008_03
Patent number
US07345043B2

Reaction notes

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