Piperazine → HCID 58707258, compound

HRID 1910607Notes

Reaction equation

HRID 1910607 reaction equation
F[C:2]1[CH:3]=[CH:4][C:5]([S:19]([CH3:22])(=[O:21])=[O:20])=[C:6]([NH:8][CH:9]2[C:18]3[C:13](=[CH:14][CH:15]=[CH:16][CH:17]=3)[O:12][CH2:11][CH2:10]2)[CH:7]=1.[NH:23]1[CH2:28][CH2:27][NH:26][CH2:25][CH2:24]1.C(N(CC)C(C)C)(C)C>C(#N)C>[CH3:22][S:19]([C:5]1[CH:4]=[CH:3][C:2]([N:23]2[CH2:28][CH2:27][NH:26][CH2:25][CH2:24]2)=[CH:7][C:6]=1[NH:8][CH:9]1[C:18]2[C:13](=[CH:14][CH:15]=[CH:16][CH:17]=2)[O:12][CH2:11][CH2:10]1)(=[O:21])=[O:20]

Participants

5

Reactant 3

HCID 4837PiperazineHCID 81531DiisopropylethylamineHCID 58707278HCID 58707278, compound

Product 1

HCID 58707258HCID 58707258, compoundYield 63.8%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

A solution of N-(5-fluoro-2-(methylsulfonyl)phenyl)chroman-4-amine (0.3 g, 0.93 mmol), piperazine (0.80 g, 9.33 mmol) and N,N-diisopropylethylamine (2.2 mL, 12.74 mmol) in acetonitrile (15 mL) was stirred at reflux for 16 h. The reaction mixture was cooled down and concentrated under reduced pressure. The residue was taken up in dichloromethane, washed with water, dried and concentrated in vacuo to yield 0.23 g of the crude aniline. The crude product was purified by PTLC (20% ethyl acetate in hexanes) to yield 144 mg (40%) of N-(2-(methylsulfonyl)-5-(piperazin-1-yl)phenyl)chroman-4-amine: 1H NMR (400 MHz, CD3Cl): δ 7.63 (d, 1H), 7.31 (d, 1H), 7.28 (m, 1H), 6.91 (m, 1H), 6.85 (d, 1H), 6.47 (d, 1H), 6.42 (d, 1H), 6.21 (s, 1H), 4.80 (br s, 2H), 4.65 (m, 1H), 4.23 (m, 2H), 3.04 (m, 4H), 2.88 (s, 3H), 2.21 (m, 2H), 2.20 (br d, 1H). MS (ESI) m/z: Calculated: 387.16; Observed: 388.2 (M++1).

Workup

  1. temperatureat reflux for 16 h
  2. temperatureThe reaction mixture was cooled down
  3. concentrationconcentrated under reduced pressure
  4. washwashed with water
  5. customdried
  6. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-279eb243ea034970b726a35fe143da88
Source dataset
uspto-grants-2013_12
Patent number
US08604021B2

Reaction notes

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