p-Toluenesulfonic acid → HCID 135939118, compound

HRID 591648Notes

Reaction equation

HRID 591648 reaction equation
[C:1]([N:4]1[CH2:9][CH2:8][N:7]([C:10]2[CH:17]=[CH:16][C:13]([CH:14]=O)=[CH:12][CH:11]=2)[CH2:6][CH:5]1[CH3:18])(=[O:3])[CH3:2].[NH2:19][C:20]1[CH:28]=[C:27]([O:29][CH3:30])[CH:26]=[C:25]([O:31][CH3:32])[C:21]=1[C:22]([NH2:24])=[O:23].OS([O-])=O.[Na+].CC1C=CC(S(O)(=O)=O)=CC=1>CC(N(C)C)=O.O>[C:1]([N:4]1[CH2:9][CH2:8][N:7]([C:10]2[CH:17]=[CH:16][C:13]([C:14]3[NH:24][C:22](=[O:23])[C:21]4[C:20](=[CH:28][C:27]([O:29][CH3:30])=[CH:26][C:25]=4[O:31][CH3:32])[N:19]=3)=[CH:12][CH:11]=2)[CH2:6][CH:5]1[CH3:18])(=[O:3])[CH3:2]

Participants

7

Reactant 4

HCID 6101p-Toluenesulfonic acidHCID 203490162-Amino-4,6-dimethoxybenzamideHCID 23665763Sodium BisulfiteHCID 86662022HCID 86662022, compound

Product 1

HCID 135939118HCID 135939118, compoundYield 21.9%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 31374DimethylacetamideSolvent

Conditions

Temperature
155 °C

Procedure

To a solution of 4-(4-acetyl-3-methylpiperazin-1-yl)benzaldehyde (0.400 g, 1.62 mmol) in DMA (15 mL) was added 2-amino-4,6-dimethoxybenzamide (0.349 g, 1.78 mmol), NaHSO3 (0.201 g, 1.94 mmol) and p-TsOH (0.030 g, 0.16 mmol). The resulting solution was heated to 155° C. for 5 hours. The mixture was cooled to room temperature, diluted with water, extracted with CH2Cl2, washed with brine, dried (Na2SO4), filtered, and concentrated in vacuo. The material was purified by flash chromatography on silica gel, eluting with 50% to 100% of 92:7:1 CHCl3/MeOH/concentrated NH4OH in CH2Cl2, to afford the title compound (0.150 g, 21%). 1H NMR (300 MHz, DMSO-d6): mixture of rotamers δ 11.57 (s, 1H), 8.10 (d, J=8.9 Hz, 2H), 6.90-7.14 (m, 2H), 6.68 (s, 1H), 6.46 (s, 1H), 4.42-4.75 (m, 0.5H), 4.03-4.42 (m, 1H), 3.61-4.02 (m, 8H), 3.41-3.60 (m, 1H), 2.85-3.13 (m, 2H), 2.63-2.85 (m, 0.5H), 1.88-2.13 (m, 3H), 1.04-1.31 (m, 3H). ESI MS m/z 423 [M+H]+.

Workup

  1. temperatureThe mixture was cooled to room temperature
  2. extractionextracted with CH2Cl2
  3. washwashed with brine
  4. dry with materialdried (Na2SO4)
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. customThe material was purified by flash chromatography on silica gel
  8. washeluting with 50% to 100% of 92:7:1 CHCl3/MeOH/concentrated NH4OH in CH2Cl2

Sources & evidence

ORD record
ord-7a9522fbe1624cb1994dca90a843f0b2
Source dataset
uspto-grants-2016_01
Patent number
US09238640B2

Reaction notes

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