Piperazine → HCID 21081908, compound

HRID 970610Notes

Reaction equation

HRID 970610 reaction equation
[CH2:1]([N:8]1[C:17]2[C:12](=[CH:13][C:14]([Cl:18])=[CH:15][CH:16]=2)[C:11](Cl)=[C:10]([C:20]#[N:21])[C:9]1=[O:22])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[NH:23]1[CH2:28][CH2:27][NH:26][CH2:25][CH2:24]1>ClCCl>[CH2:1]([N:8]1[C:17]2[C:12](=[CH:13][C:14]([Cl:18])=[CH:15][CH:16]=2)[C:11]([N:23]2[CH2:28][CH2:27][NH:26][CH2:25][CH2:24]2)=[C:10]([C:20]#[N:21])[C:9]1=[O:22])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

4

Reactant 2

HCID 4837PiperazineHCID 210819041-Benzyl-4,6-dichloro-2-oxo-1,2-dihydroquinoline-3-carbonitrile

Product 1

HCID 21081908HCID 21081908, compoundYield 98%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

A solution of Compound 68 (0.8 g, 2.43 mmol) in dichloromethane was added slowly to a stirred solution of piperazine (628 mg g, 7.29 mmol) in dichloromethane at room temperature. The solution was stirred overnight at room temperature. The solvent was then 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 0.9 g (98%) of yellow solids. M.P. 156° C. 1H NMR (DMSO-d6): δ 2.94 (m, 4H), 3.55 (m, 4H), 5.47 (s, 2H), 7.19 (m, 2H), 7.24 (m, 1H), 7.31 (m, 2H), 7.39 (d, J=8.9 Hz, 1H), 7.64 (dd, J=2.6, 8.9 Hz, 1H), 7.81 (d, J=2.6 Hz, 1H). EIMS m/z 379 (M+1).

Workup

  1. customThe solvent was then 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-0c9ab27d549541bbb5af9f0f8f5fa4d7
Source dataset
uspto-grants-2007_12
Patent number
US07312221B2

Reaction notes

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