Acetic Anhydride → HCID 11191334, compound

HRID 347366Notes

Reaction equation

HRID 347366 reaction equation
[NH:1]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[CH:3]=[C:2]1[C:10]1[C:11]([O:32][CH3:33])=[CH:12][C:13]([O:30][CH3:31])=[C:14](/[CH:16]=[CH:17]/[C:18]([C:20]2[CH:25]=[CH:24][C:23]([S:26]([NH2:29])(=[O:28])=[O:27])=[CH:22][CH:21]=2)=[O:19])[CH:15]=1.CCN(CC)CC.[CH3:41][C:42](OC(C)=O)=[O:43]>CN(C1C=CN=CC=1)C.C1COCC1>[C:42]([NH:29][S:26]([C:23]1[CH:22]=[CH:21][C:20]([C:18](=[O:19])/[CH:17]=[CH:16]/[C:14]2[CH:15]=[C:10]([C:2]3[NH:1][C:9]4[C:4]([CH:3]=3)=[CH:5][CH:6]=[CH:7][CH:8]=4)[C:11]([O:32][CH3:33])=[CH:12][C:13]=2[O:30][CH3:31])=[CH:25][CH:24]=1)(=[O:28])=[O:27])(=[O:43])[CH3:41]

Participants

6

Reactant 3

HCID 7918Acetic AnhydrideHCID 8471TriethylamineHCID 210416274-{3E-[5-(1H-indol-2-yl)-2,4-dimethoxyphenyl]acryloyl}benzenesulfonamide

Product 1

HCID 11191334HCID 11191334, compoundYield 62%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 4-{3E-[5-(1H-indol-2-yl)-2,4-dimethoxyphenyl]acryloyl}benzenesulfonamide (Ex-35E, 0.462 g, 1 mmol), DMAP (0.012 g, 0.1 mmol), and Et3N (0.1 g, 1.05 mmol) in 50 ml of THF, was added Ac2O (0.204 g, 2 mmol). The reaction mixture was stirred at room temperature overnight. The yellow solid precipitated was filtered and redissolved in 50% ethanol in water (50 mL). The clear solution was then adjusted to pH1, and the solid formed was filtered and washed with water to give 0.31 g (62%) the title compound as a red solid, mp 218–220° C. 1H-NMR (300 MHz, DMSO-d6) δ 12.26 (br, 1H), 11.15 (s, 1H), 8.32 (s, 1H), 8.25 (d, J=8 Hz, 2H), 8.04–8.09 (m, 3H), 7.83 (d, J=15 Hz, 1H), 7.49 (d, J=7 Hz, 1H), 7.42 (d, J=8 Hz, 1H), 7.02–7.07 (m, 1H), 6.93–6.97(m, 2H), 6.82 (s, 1H), 4.03 (s, 3H), 3.99 (s, 3H), 1.94 (s, 3H). HRMS (EI) Calcd for C27H24N2O6S: 504.1335 ([M]+); Found: 504.1365.

Workup

  1. customThe yellow solid precipitated
  2. filtrationwas filtered
  3. dissolutionredissolved in 50% ethanol in water (50 mL)
  4. customthe solid formed
  5. filtrationwas filtered
  6. washwashed with water

Sources & evidence

ORD record
ord-75bf753cebcb4f7b8644527da72b4611
Source dataset
uspto-grants-2007_02
Patent number
US07173129B2

Reaction notes

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