2-Thiophenecarbonyl chloride → 1,6-Dimethyl-2-oxo-4-[4-(thiophene-2-carbonyl)-piperazin-1-yl]-1,2-dihydro-quinolin-3-carbonitrile

HRID 1767489Notes

Reaction equation

HRID 1767489 reaction equation
[S:1]1[CH:5]=[CH:4][CH:3]=[C:2]1[C:6](Cl)=[O:7].[CH3:9][N:10]1[C:19]2[C:14](=[CH:15][C:16]([CH3:20])=[CH:17][CH:18]=2)[C:13]([N:21]2[CH2:26][CH2:25][NH:24][CH2:23][CH2:22]2)=[C:12]([C:27]#[N:28])[C:11]1=[O:29]>N1C=CC=CC=1>[CH3:9][N:10]1[C:19]2[C:14](=[CH:15][C:16]([CH3:20])=[CH:17][CH:18]=2)[C:13]([N:21]2[CH2:26][CH2:25][N:24]([C:6]([C:2]3[S:1][CH:5]=[CH:4][CH:3]=3)=[O:7])[CH2:23][CH2:22]2)=[C:12]([C:27]#[N:28])[C:11]1=[O:29]

Participants

4

Reactant 2

HCID 789282-Thiophenecarbonyl chlorideHCID 210819011,6-Dimethyl-2-oxo-4-piperazin-1-yl-1,2-dihydro-quinoline-3-carbonitrile

Product 1

HCID 211143481,6-Dimethyl-2-oxo-4-[4-(thiophene-2-carbonyl)-piperazin-1-yl]-1,2-dihydro-quinolin-3-carbonitrileYield 70.6%

Reagents, catalysts & solvents 1

HCID 1049PyridineSolvent

Procedure

2-Thiophene carbonyl chloride (160 μL, 1.5 mmol) was added to a stirred solution of Compound 28 (282 mg, 1.0 mmol) in pyridine (5 mL) under argon at 0° C. The solution was allowed to come to room temperature and further stirred overnight. The solution was poured into ice water and the solids formed were filtered. The solids were washed by excess water, dried, and recrystallized by ethyl acetate to yield 277 mg (70%) of white solids. M.P. 214° C. 1H NMR (DMSO-d6): δ 2.41 (s, 3H), 3.55 (s, 3H), 3.63 (m, 4H), 3.92 (m, 4H), 7.16 (t, J=4.1 Hz, 1H), 7.47 (m, 2H), 7.56 (d, J=8.7 Hz, 1H), 7.68 (s, 1H), 7.80 (d, J=4.9 Hz, 1H). EIMS m/z 393 (M+1), 415 (M+23). Anal. (C21H20N4O2S) C, H, N.

Workup

  1. customto come to room temperature
  2. customthe solids formed
  3. filtrationwere filtered
  4. washThe solids were washed by excess water
  5. customdried
  6. customrecrystallized by ethyl acetate

Sources & evidence

ORD record
ord-8b05d2d3817549729223a732eae3527e
Source dataset
uspto-grants-2007_06
Patent number
US07235546B2

Reaction notes

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