2-Chlorobenzenesulfonyl chloride → 1-[(2-Chlorophenyl)sulfonyl]-4-[4-fluoro-2-(trifluoromethyl)phenyl]piperazine

HRID 1868080Notes

Reaction equation

HRID 1868080 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][C:5]([N:8]2[CH2:13][CH2:12][NH:11][CH2:10][CH2:9]2)=[C:4]([C:14]([F:17])([F:16])[F:15])[CH:3]=1.[Cl:18][C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][C:20]=1[S:25](Cl)(=[O:27])=[O:26].C(N(C(C)C)CC)(C)C>ClCCl>[Cl:18][C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][C:20]=1[S:25]([N:11]1[CH2:12][CH2:13][N:8]([C:5]2[CH:6]=[CH:7][C:2]([F:1])=[CH:3][C:4]=2[C:14]([F:16])([F:15])[F:17])[CH2:9][CH2:10]1)(=[O:27])=[O:26]

Participants

5

Reactant 3

HCID 761872-Chlorobenzenesulfonyl chlorideHCID 81531DiisopropylethylamineHCID 579797591-(4-Fluoro-2-(trifluoromethyl)phenyl)piperazine

Product 1

HCID 685508961-[(2-Chlorophenyl)sulfonyl]-4-[4-fluoro-2-(trifluoromethyl)phenyl]piperazineYield 73.3%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

Sulfonylation of 1-(4-fluoro-2-(trifluoromethyl)phenyl)piperazine (386 mg, 1.55 mmol) with 2-chlorobenzene-1-sulfonyl chloride (382.2 mg, 1.555 mmol) was carried out according to a similar to the representative sulfonation procedure described in Example 1 using anhydrous dichloromethane (3 mL) as solvent and diisopropylethylamine (1.35 mL, 7.775 mmol) as base. 1-[(2-chlorophenyl)sulfonyl]-4-[4-fluoro-2-(trifluoromethyl)phenyl]piperazine was obtained in 73.3% yield (481.8 mg) as white solid.

Sources & evidence

ORD record
ord-ff095077e03846ef9af869190bc6118c
Source dataset
uspto-grants-2009_12
Patent number
US07632838B2

Reaction notes

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