Methyl iodide → Methyl 4-[(3,4-dimethylphenyl)(methyl)amino]-2-methyl-1-oxo-1,2-dihydro-3-isoquinolinecarboxylate

HRID 572516Notes

Reaction equation

HRID 572516 reaction equation
[CH3:1][C:2]1[CH:3]=[C:4]([NH:9][C:10]2[C:19]3[C:14](=[CH:15][CH:16]=[CH:17][CH:18]=3)[C:13](=[O:20])[N:12]([CH3:21])[C:11]=2[C:22]([O:24][CH3:25])=[O:23])[CH:5]=[CH:6][C:7]=1[CH3:8].[H-].[Na+].[CH3:28]I.Cl.O>CN(C=O)C>[CH3:1][C:2]1[CH:3]=[C:4]([N:9]([CH3:28])[C:10]2[C:19]3[C:14](=[CH:15][CH:16]=[CH:17][CH:18]=3)[C:13](=[O:20])[N:12]([CH3:21])[C:11]=2[C:22]([O:24][CH3:25])=[O:23])[CH:5]=[CH:6][C:7]=1[CH3:8]

Participants

6

Reactant 4

HCID 6328Methyl iodideHCID 24758Sodium hydrideHCID 21885828Hydrate;hydrochlorideHCID 68295443Methyl 4-[(3,4-dimethylphenyl)amino]-2-methyl-1-oxo-1,2-dihydro-3-isoquinolinecarboxylate

Product 1

HCID 68295419Methyl 4-[(3,4-dimethylphenyl)(methyl)amino]-2-methyl-1-oxo-1,2-dihydro-3-isoquinolinecarboxylateYield 95%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of methyl 4-[(3,4-dimethylphenyl)amino]-2-methyl-1-oxo-1,2-dihydro-3-isoquinolinecarboxylate (2.03 g, 6.03 mmol) in DMF (40 mL) at 0° C. was added sodium hydride (0.362 g, 9.05 mmol) followed by methyl iodide (5.66 mL, 91 mmol). The mixture was stirred at room temperature for 18 hours. 1M HCl/water was added and the mixture was extracted with EtOAc. The organic phase was washed with brine, dried over sodium sulfate and evaporated in vacuo. The crude product was purified on silica using EtOAc/hexanes 30-50% to provide the title compound as an off-white solid (2 g, 95%): 1H NMR (400 MHz, CDCl3) δ ppm 8.56-8.37 (m, 1 H), 8.03 (s, 1 H), 7.62-7.47 (m, 2 H), 6.93 (d, J=8.4 Hz, 1 H), 6.48 (d, J=2.3 Hz, 1 H), 6.40 (dd, J=2.5, 8.2 Hz, 1 H), 3.77 (s, 3 H), 3.57 (s, 3 H), 3.24 (s, 3 H), 3.04-2.95 (m, 2 H), 2.89 (s, 2 H), 2.17 (d, J=8.8 Hz, 6 H);); ES-LCMS: 351.3 (M+1).

Workup

  1. extractionthe mixture was extracted with EtOAc
  2. washThe organic phase was washed with brine
  3. dry with materialdried over sodium sulfate
  4. customevaporated in vacuo
  5. customThe crude product was purified on silica

Sources & evidence

ORD record
ord-7424a118e0eb4df99d93d827129729f1
Source dataset
uspto-grants-2015_05
Patent number
US09029391B2

Reaction notes

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