Dimethyl Sulfoxide → 1-[2-Chloro-5-(methyloxy)-4-nitrophenyl]-4-[2-(methylsulfonyl)ethyl]piperazine

HRID 419610

Reaction equation

[CH3:1][O:2][C:3]1[CH:8]=[C:7](F)[C:6]([Cl:10])=[CH:5][C:4]=1[N+:11]([O-:13])=[O:12].Cl.[CH3:15][S:16]([CH2:19][CH2:20][N:21]1[CH2:26][CH2:25][NH:24][CH2:23][CH2:22]1)(=[O:18])=[O:17].C([O-])([O-])=O.[K+].[K+].CS(C)=O>O>[Cl:10][C:6]1[CH:5]=[C:4]([N+:11]([O-:13])=[O:12])[C:3]([O:2][CH3:1])=[CH:8][C:7]=1[N:24]1[CH2:23][CH2:22][N:21]([CH2:20][CH2:19][S:16]([CH3:15])(=[O:17])=[O:18])[CH2:26][CH2:25]1

Participants

Conditions

Temperature: 100 °C

Procedure

To 1-chloro-2-fluoro-4-(methyloxy)-5-nitrobenzene (Example 104, Step B) (0.822 g, 4.0 mmol), 4-[2-(methylsulfonyl)ethyl]piperazine hydrochloride (Example 148, Step B) (0.915 g, 4.0 mmol), and K2CO3 (1.7 g, 12 mmol) was added DMSO (8 mL). The reaction was heated to 100° C. for two days. The reaction was determined to be complete by TLC. The reaction mixture was diluted with H2O and extracted with DCM and EtOAc sequentially for two iterations. The organic was dried (MgSO4), filtered, and rotovapped down. Purification by flash chromatography provided the title compound of Step A (1.38 g, 91%). MS (M+H, ES+) 378.

Workup

extractionextracted with DCM and EtOAc sequentially for two iterations
dry with materialThe organic was dried (MgSO4)
filtrationfiltered
customPurification by flash chromatography

Sources & evidence

ORD record: ord-86d4005b11134c4792f37dc014c8d999
Source dataset: uspto-grants-2012_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08093239B2

Linked notes

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