Piperazine → 1,6-Dimethyl-2-oxo-4-piperazin-1-yl-1,2-dihydro-quinoline-3-carbonitrile

HRID 970575Notes

Reaction equation

HRID 970575 reaction equation
Cl[C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[C:9]([CH3:12])[CH:10]=2)[N:5]([CH3:13])[C:4](=[O:14])[C:3]=1[C:15]#[N:16].[NH:17]1[CH2:22][CH2:21][NH:20][CH2:19][CH2:18]1>ClCCl>[CH3:13][N:5]1[C:6]2[C:11](=[CH:10][C:9]([CH3:12])=[CH:8][CH:7]=2)[C:2]([N:17]2[CH2:22][CH2:21][NH:20][CH2:19][CH2:18]2)=[C:3]([C:15]#[N:16])[C:4]1=[O:14]

Participants

4

Reactant 2

HCID 4837PiperazineHCID 210819594-Chloro-1,6-dimethyl-2-oxo-1,2-dihydro-quinoline-3-carbonitrile

Product 1

HCID 210819011,6-Dimethyl-2-oxo-4-piperazin-1-yl-1,2-dihydro-quinoline-3-carbonitrileYield 88.1%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

A solution of Compound 23 (1 g, 4.3 mmol) in dichloromethane was added slowly to a stirred solution of piperazine (1.1 g, 12.9 mmol) in dichloromethane at room temperature. The solution was stirred overnight at room temperature. The solvent was removed under reduced pressure. The residue was taken in water, sonicated briefly, and filtered. The solids were dissolved in ethyl acetate and washed by water. The organic layer was dried over Na2SO4 and concentrated to yield 1.07 g (88%) yellow solids. M.P. 274° C. 1H NMR (DMSO-d6): δ 2.39 (s, 3H), 2.94 (m, 4H), 3.48 (m, 4H), 3.54 (s, 3H), 7.45 (d, J=8.6 Hz, 1H), 7.56 (dd, J=1.3, 8.6 Hz, 1H), 7.64 (s, 1H). EIMS m/z 283 (M+1).

Workup

  1. customThe solvent was removed under reduced pressure
  2. customsonicated briefly
  3. filtrationfiltered
  4. dissolutionThe solids were dissolved in ethyl acetate
  5. washwashed by water
  6. dry with materialThe organic layer was dried over Na2SO4
  7. concentrationconcentrated

Sources & evidence

ORD record
ord-eb5c78395a6d49138affc75960dc3cb1
Source dataset
uspto-grants-2007_12
Patent number
US07312221B2

Reaction notes

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