Acetic Anhydride → HCID 118307491, compound

HRID 1497340Notes

Reaction equation

HRID 1497340 reaction equation
[Br:1][C:2]1[CH:3]=[CH:4][C:5]([N+:10]([O-:12])=[O:11])=[C:6]([CH2:8][NH2:9])[CH:7]=1.[C:13](OC(=O)C)(=[O:15])[CH3:14].C(OCC)(=O)C>N1C=CC=CC=1>[Br:1][C:2]1[CH:3]=[CH:4][C:5]([N+:10]([O-:12])=[O:11])=[C:6]([CH:7]=1)[CH2:8][NH:9][C:13](=[O:15])[CH3:14]

Participants

5

Reactant 3

HCID 7918Acetic AnhydrideHCID 8857Ethyl AcetateHCID 53401485HCID 53401485, compound

Product 1

HCID 118307491HCID 118307491, compoundYield 98%

Reagents, catalysts & solvents 1

HCID 1049PyridineSolvent

Procedure

To a solution of compound 13 (2.5 g, 10.82 mmol) in pyridine (20 mL) was added acetic anhydride (2 mL, 21.60 mmol) and the mixture was stirred at room temperature for 12 h. The reaction was added ethyl acetate (30 mL) and the organic layer was washed sequentially with H2O (20 mL), 1N HCl (15 mL×3), brine (15 mL) and dried over Na2SO4 and evaporated to get the title compound as an off-white solid (2.89 g, 98%). IR (KBr) νmax. cm−1: 3419 (NH), 3062 (Ar—H), 2925 (Alph-H), 1695 (C═O), 1604, 1564 (C═C), 1520, 1435 (NO2), 1232 (C—N), 1168 (C—O). 1H NMR (500 MHz, CDCl3) δ=2.19 (s, 3H, CH3); 5.50 (s, 2H, CH2); 7.63 (dd, 1H, J=2.3, 8.6 Hz, H-4); 7.75 (d, 1H, J=2.3, H-6), 8.00 (d, 1H, J=8.6 Hz, H-3). 13C NMR (125.7 MHz, CDCl3) δ=20.78 (CH3), 62.27 (CH2), 126.58 (C-3), 129.03 (C-1), 131.73 (C-6), 131.82 (C-4), 134.34 (C-5), 145.33 (C-2), 170.10 (CO). Calculated (%) for C9H9BrN2O3 (271.98); C, 39.58; H, 3.32; N, 10.26. found (%); C, 39.52; H, 3.36; N, 10.20.

Workup

  1. washthe organic layer was washed sequentially with H2O (20 mL), 1N HCl (15 mL×3), brine (15 mL)
  2. dry with materialdried over Na2SO4
  3. customevaporated

Sources & evidence

ORD record
ord-ddf1d7b4a51b4b848638ed2ba7a409f2
Source dataset
uspto-grants-2015_12
Patent number
US09199969B1

Reaction notes

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