Potassium Carbonate → Methyl 2-methoxy-4-(4-methylpiperazin-1-yl)benzoate

HRID 571951Notes

Reaction equation

HRID 571951 reaction equation
[CH3:1][O:2][C:3]1[CH:12]=[C:11](F)[CH:10]=[CH:9][C:4]=1[C:5]([O:7][CH3:8])=[O:6].C([O-])([O-])=O.[K+].[K+].[CH3:20][N:21]1[CH2:26][CH2:25][NH:24][CH2:23][CH2:22]1>CS(C)=O.C(Cl)Cl>[CH3:1][O:2][C:3]1[CH:12]=[C:11]([N:24]2[CH2:25][CH2:26][N:21]([CH3:20])[CH2:22][CH2:23]2)[CH:10]=[CH:9][C:4]=1[C:5]([O:7][CH3:8])=[O:6]

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 531671-MethylpiperazineHCID 10241478Methyl 4-fluoro-2-methoxybenzoate

Product 1

HCID 66996253Methyl 2-methoxy-4-(4-methylpiperazin-1-yl)benzoateYield 66.3%

Reagents, catalysts & solvents 2

HCID 679Dimethyl SulfoxideSolventHCID 6344DichloromethaneSolvent

Procedure

Methyl 2-methoxy-4-fluoro-benzoate (1.6 gr, 9.7 mmol), K2CO3 (1.3 gr, 9.7 mmol) and N-methyl piperazine (1.3 mL, 11.7 mmol) were heated at 100° C. in DMSO (5 mL) for 20 hours. Reaction mixture was diluted with DCM and washed with water. Organic phase was dried over sodium sulfate and evaporated to dryness. Column chromatography purification on silica gel using dichloromethane/methanol 95:5 as the eluant, afforded 1.7 g (yield 66%) of the title compound.

Workup

  1. customReaction mixture
  2. washwashed with water
  3. dry with materialOrganic phase was dried over sodium sulfate
  4. customevaporated to dryness
  5. customColumn chromatography purification on silica gel

Sources & evidence

ORD record
ord-9aa023c2d5434c30b0e9909d31e87d41
Source dataset
uspto-grants-2015_05
Patent number
US09029356B2

Reaction notes

Loading…