Methyl iodide → [7-Fluoro-2-(4-nitro-phenyl)-1-oxo-1,2-dihydro-isoquinolin-6-yl]-methyl-carbamic acid tert-butyl ester

HRID 1593045Notes

Reaction equation

HRID 1593045 reaction equation
[C:1]([O:5][C:6](=[O:29])[NH:7][C:8]1[CH:9]=[C:10]2[C:15](=[CH:16][C:17]=1[F:18])[C:14](=[O:19])[N:13]([C:20]1[CH:25]=[CH:24][C:23]([N+:26]([O-:28])=[O:27])=[CH:22][CH:21]=1)[CH:12]=[CH:11]2)([CH3:4])([CH3:3])[CH3:2].[C:30](=O)([O-])[O-].[Cs+].[Cs+].CI>CN(C=O)C>[C:1]([O:5][C:6](=[O:29])[N:7]([C:8]1[CH:9]=[C:10]2[C:15](=[CH:16][C:17]=1[F:18])[C:14](=[O:19])[N:13]([C:20]1[CH:25]=[CH:24][C:23]([N+:26]([O-:28])=[O:27])=[CH:22][CH:21]=1)[CH:12]=[CH:11]2)[CH3:30])([CH3:4])([CH3:2])[CH3:3]

Participants

5

Reactant 3

HCID 6328Methyl iodideHCID 10796Cesium carbonateHCID 58998509[7-Fluoro-2-(4-nitro-phenyl)-1-oxo-1,2-dihydro-isoquinolin-6-yl]-carbamic acid tert-butyl ester

Product 1

HCID 58998426[7-Fluoro-2-(4-nitro-phenyl)-1-oxo-1,2-dihydro-isoquinolin-6-yl]-methyl-carbamic acid tert-butyl esterYield 93%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of [7-Fluoro-2-(4-nitro-phenyl)-1-oxo-1,2-dihydro-isoquinolin-6-yl]-carbamic acid tert-butyl ester (0.36 g, 0.9 mmol) in dry DMF (9 mL) was added cesium carbonate (1.04 g, 3.19 mmol) followed by neat methyl iodide (0.064 mL, 1.03 mmol). The mixture was stirred at room temperature for 3.5 hr, extracted into ethyl acetate (150 mL), washed with water (2×50 mL) and brine (50 mL), dried over sodium sulfate, filtered, concentrated in vacuo and dried to give 0.34 g (93%) of pure [7-Fluoro-2-(4-nitro-phenyl)-1-oxo-1,2-dihydro-isoquinolin-6-yl]-methyl-carbamic acid tert-butyl ester. RP-HPLC: 5.89 min; ES-MS (M+H)+=414.0; 1H-NMR (DMSO-d6) δ (ppm): 1.33 (s, 9), 3.20 (s, 3), 6.75 (d, 1), 7.52 (d, 1), 7.80 (d, 2), 7.83 (d, 1), 7.93 (d, 1), 8.35 (d, 2).

Workup

  1. extractionextracted into ethyl acetate (150 mL)
  2. washwashed with water (2×50 mL) and brine (50 mL)
  3. dry with materialdried over sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. customdried

Sources & evidence

ORD record
ord-3aac9f4857c24feebde908e64fd35023
Source dataset
uspto-grants-2007_11
Patent number
US07294635B2

Reaction notes

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