Water → 1-{1-[2-Methyl-5-(methyloxy)-4-nitrophenyl]-4-piperidinyl}-4-(methylsulfonyl)piperazine

HRID 419648Notes

Reaction equation

[CH3:1][O:2][C:3]1[CH:8]=[C:7](F)[C:6]([CH3:10])=[CH:5][C:4]=1[N+:11]([O-:13])=[O:12].Cl.Cl.[CH3:16][S:17]([N:20]1[CH2:25][CH2:24][N:23]([CH:26]2[CH2:31][CH2:30][NH:29][CH2:28][CH2:27]2)[CH2:22][CH2:21]1)(=[O:19])=[O:18].C([O-])([O-])=O.[K+].[K+].O>CS(C)=O>[CH3:10][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:29]1[CH2:28][CH2:27][CH:26]([N:23]2[CH2:24][CH2:25][N:20]([S:17]([CH3:16])(=[O:19])=[O:18])[CH2:21][CH2:22]2)[CH2:31][CH2:30]1

Participants

Conditions

Temperature: 100 °C

Procedure

A mixture of 1-fluoro-2-methyl-5-(methyloxy)-4-nitrobenzene (Example 113, Step B) (0.90 g, 4.9 mmol), 1-(methylsulfonyl)-4-(4-piperidinyl)piperazine (Example 204, step C) (1.20 g, 4.9 mmol) and K2CO3 (0.81 g, 5.8 mmol) in DMSO (15 mL) was heated at 100° C. for 48 h. The reaction was cooled to rt, poured into H2O and extracted exhaustively with DCM. The combined organics were washed with H2O then dried over MgSO4. The resultant solution was concentrated onto silica and purified by flash chromatography to afford 1-{1-[2-methyl-5-(methyloxy)-4-nitrophenyl]-4-piperidinyl}-4-(methylsulfonyl)piperazine (1.09 g, 55%). 1H NMR (400 MHz, DMSO-d6) δ ppm 7.77 (s, 1H), 6.69 (s, 1H), 3.90 (s, 3H), 3.29-3.38 (m, 2H), 3.06-3.15 (m, 4H), 2.87 (s, 3H), 2.68-2.79 (m, 2H), 2.59-2.66 (m, 4H), 2.40-2.48 (m, 1H), 2.20 (s, 3H), 1.80-1.92 (m, 2H), 1.49-1.67 (m, 2H).

Workup

temperatureThe reaction was cooled to rt
extractionextracted exhaustively with DCM
washThe combined organics were washed with H2O
dry with materialthen dried over MgSO4
concentrationThe resultant solution was concentrated onto silica
custompurified by flash chromatography

Sources & evidence

ORD record: ord-bcd3cb8c572a4bd5a90560cf1469b89e
Source dataset: uspto-grants-2012_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08093239B2

Reaction notes

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