Iodoethane → 5-(4,4-Dimethyl-2-oxo-1,4-dihydro-2H-benzo[d][1,3]oxazin-6-yl)-1-ethyl-1H-pyrrole-2-carbonitrile

HRID 2260982Notes

Reaction equation

HRID 2260982 reaction equation
[CH3:1][C:2]1([CH3:20])[C:7]2[CH:8]=[C:9]([C:12]3[NH:16][C:15]([C:17]#[N:18])=[CH:14][CH:13]=3)[CH:10]=[CH:11][C:6]=2[NH:5][C:4](=[O:19])[O:3]1.C(=O)([O-])[O-].[K+].[K+].I[CH2:28][CH3:29].C(OC(=O)C)C>CN(C)C=O.O>[CH3:1][C:2]1([CH3:20])[C:7]2[CH:8]=[C:9]([C:12]3[N:16]([CH2:28][CH3:29])[C:15]([C:17]#[N:18])=[CH:14][CH:13]=3)[CH:10]=[CH:11][C:6]=2[NH:5][C:4](=[O:19])[O:3]1

Participants

7

Reactant 4

HCID 6340IodoethaneHCID 8857Ethyl AcetateHCID 11430Potassium CarbonateHCID 102209945-(4,4-Dimethyl-oxo-1,4-dihydro-2H-3,1-benzoxazine-6-yl)-1H-pyrrole-carbonitrile

Product 1

HCID 99042255-(4,4-Dimethyl-2-oxo-1,4-dihydro-2H-benzo[d][1,3]oxazin-6-yl)-1-ethyl-1H-pyrrole-2-carbonitrile

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

To a solution of 5-(4,4-dimethyl-2-oxo-1,4-dihydro-2H-3,1-benzoxazin-6-yl)-1H-pyrrole-2-carbonitrile (1.3 g, 5 mmol) in dimethylformamide (25 ml) was added potassium carbonate (1 g, 7.5 mmol), and iodoethane (0.4 ml, 5.1 mmol), and the mixture was stirred at room temperature for 3 hours. Ethylacetate and water were added, the ethylacetate layer was separated, dried over magnesium sulfate, and concentrated in vacuo. The residue was recrystallized from ethylacetate/hexane to afford the title compound, m.p. 200-202° C. (0.4 g, 27%); 1H-NMR (DMSO-d6) δ 1.25 (t, J=7.2 Hz, 3H), 1.64 (s, 6H), 4.07 (q, J=7.2 Hz, 2H), 6.29 (d, J=4.1 Hz, 1H), 7.0 (d, J=8 Hz, 1H), 7.05 (d, J=4.1 Hz, 1H), 7.34 (m, 2H), 10.42 (s, 1H). MS (ESI (−)) m/z 294 (M−H)−

Workup

  1. customthe ethylacetate layer was separated
  2. dry with materialdried over magnesium sulfate
  3. concentrationconcentrated in vacuo
  4. customThe residue was recrystallized from ethylacetate/hexane

Sources & evidence

ORD record
ord-c6deecad77aa458c9e42a9f62a97b8ca
Source dataset
uspto-grants-2010_12
Patent number
US07846924B2

Reaction notes

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