p-Toluenesulfonic acid → 2-(4-((3R,5S)-4-Isopropyl-3,5-dimethylpiperazin-1-yl)phenyl)-5,7-dimethoxyquinazolin-4(3H)-one

HRID 591659Notes

Reaction equation

HRID 591659 reaction equation
[CH:1]([N:4]1[CH:9]([CH3:10])[CH2:8][N:7]([C:11]2[CH:18]=[CH:17][C:14]([CH:15]=O)=[CH:13][CH:12]=2)[CH2:6][CH:5]1[CH3:19])([CH3:3])[CH3:2].OS([O-])=O.[Na+].CC1C=CC(S(O)(=O)=O)=CC=1.[NH2:36][C:37]1[CH:45]=[C:44]([O:46][CH3:47])[CH:43]=[C:42]([O:48][CH3:49])[C:38]=1[C:39]([NH2:41])=[O:40]>CC(N(C)C)=O.O>[CH:1]([N:4]1[C@@H:9]([CH3:10])[CH2:8][N:7]([C:11]2[CH:18]=[CH:17][C:14]([C:15]3[NH:41][C:39](=[O:40])[C:38]4[C:37](=[CH:45][C:44]([O:46][CH3:47])=[CH:43][C:42]=4[O:48][CH3:49])[N:36]=3)=[CH:13][CH:12]=2)[CH2:6][C@H:5]1[CH3:19])([CH3:3])[CH3:2]

Participants

7

Reactant 4

HCID 6101p-Toluenesulfonic acidHCID 203490162-Amino-4,6-dimethoxybenzamideHCID 23665763Sodium BisulfiteHCID 866620244-(4-Isopropyl-3,5-dimethylpiperazin-1-yl)benzaldehyde

Product 1

HCID 1362626562-(4-((3R,5S)-4-Isopropyl-3,5-dimethylpiperazin-1-yl)phenyl)-5,7-dimethoxyquinazolin-4(3H)-oneYield 17.4%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 31374DimethylacetamideSolvent

Conditions

Temperature
140 °C

Procedure

A mixture of 4-(4-isopropyl-3,5-dimethylpiperazin-1-yl)benzaldehyde (0.400 g, 1.50 mmol), NaHSO3 (0.195 g, 1.80 mmol), and p-TsOH (0.030 g, 0.15 mmol) was added to a solution of 2-amino-4,6-dimethoxybenzamide (0.400 g, 2.40 mmol) in DMA (10 mL). The reaction was stirred at 140° C. for 4 hours, then at room temperature overnight. The mixture was diluted with H2O and extracted with CH2Cl2. The organics were washed with brine, dried (Na2SO4), filtered, and concentrated in vacuo. Purification by flash chromatography on silica gel, eluting with 1% to 10% MeOH/CH2Cl2, followed by reverse-phase chromatography, eluting with 10% to 90% CH3CN in H2O, afforded the title compound (0.114 g, 17%). 1H NMR (300 MHz, DMSO-d6): δ 11.68 (s, 1H), 8.09 (d, J=8.9 Hz, 2H), 6.78 (d, J=9.0 Hz, 2H), 6.66 (s, 1H), 6.44 (s, 1H), 3.87 (s, 3H), 3.83 (s, 3H), 3.41-3.44 (m, 2H), 3.11-3.23 (m, 5H), 1.00-1.03 (m, 12H). ESI MS m/z 437 [M+H]+.

Workup

  1. customat room temperature
  2. customovernight
  3. extractionextracted with CH2Cl2
  4. washThe organics were washed with brine
  5. dry with materialdried (Na2SO4)
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo
  8. customPurification by flash chromatography on silica gel
  9. washeluting with 1% to 10% MeOH/CH2Cl2
  10. washeluting with 10% to 90% CH3CN in H2O

Sources & evidence

ORD record
ord-826f31a2a8a3474e92a2a1941ba96671
Source dataset
uspto-grants-2016_01
Patent number
US09238640B2

Reaction notes

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