p-Toluenesulfonic acid monohydrate → HCID 135939043, compound

HRID 591704Notes

Reaction equation

[CH:1]([C:3]1[CH:8]=[CH:7][C:6]([NH:9][S:10]([CH3:13])(=[O:12])=[O:11])=[CH:5][CH:4]=1)=O.[NH2:14][C:15]1[CH:23]=[C:22]([O:24][CH3:25])[CH:21]=[C:20]([O:26][CH3:27])[C:16]=1[C:17]([NH2:19])=[O:18].OS([O-])=O.[Na+].CC1C=CC(S(O)(=O)=O)=CC=1.O>CC(N(C)C)=O.CCOC(C)=O>[CH3:27][O:26][C:20]1[CH:21]=[C:22]([O:24][CH3:25])[CH:23]=[C:15]2[C:16]=1[C:17](=[O:18])[NH:19][C:1]([C:3]1[CH:8]=[CH:7][C:6]([NH:9][S:10]([CH3:13])(=[O:12])=[O:11])=[CH:5][CH:4]=1)=[N:14]2

Participants

Conditions

Temperature: 155 °C

Procedure

A mixture of N-(4-formylphenyl)methanesulfonamide (0.161 g, 0.0800 mmol), 2-amino-4,6-dimethoxybenzamide (0.159 g, 0.0800 mmol), NaHSO3 (94%, 0.00460 g, 0.0240 mmol), and p-TsOH.H2O (0.0125 g, 0.120 mmol) in DMA (1.00 mL) was heated at 155° C. for 16 hours. The mixture was diluted with EtOAc (50 mL), washed with water (2×50 mL), then brine (50 mL), dried over Na2SO4, filtered, and the solvent was removed under vacuum. The residue was purified over silica gel (12 g, CH2Cl2/MeOH) and the product was freeze-dried from MeCN/H2O to provide the title compound (0.0341 g, 11%) as a pale yellow solid. 1H NMR (300 MHz, DMSO-d6): δ 11.94 (s, 1H), 10.21 (s, 1H), 8.16 (d, J=8.76 Hz, 2H), 7.30 (d, J=8.76 Hz, 2H), 6.72 (d, J=2.25 Hz, 1H), 6.52 (d, J=2.25 Hz, 1H), 3.89 (s, 3H), 3.85 (s, 3H), 3.09 (s, 3H). MS (ESI) m/z 376 [C17H17N3O5S+H]+.

Workup

washwashed with water (2×50 mL)
dry with materialbrine (50 mL), dried over Na2SO4
filtrationfiltered
customthe solvent was removed under vacuum
customThe residue was purified over silica gel (12 g, CH2Cl2/MeOH)
dry with materialthe product was freeze-dried from MeCN/H2O

Sources & evidence

ORD record: ord-47d5815fe3904d528b3727dc6c509f6d
Source dataset: uspto-grants-2016_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09238640B2

Reaction notes

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