Hydrogen Bromide → HCID 66758260, compound

HRID 556898Notes

Reaction equation

HRID 556898 reaction equation
[CH:1]1([C:4]2(O)[C:14]3[C:9](=[N:10][CH:11]=[CH:12][CH:13]=3)[O:8][C:7]3[CH:15]=[CH:16][CH:17]=[C:18]([O:19][CH3:20])[C:6]=3[CH2:5]2)[CH2:3][CH2:2]1.[BrH:22].O.[OH-].[Na+]>C(O)(=O)C.C(OCC)(=O)C>[Br:22][CH2:3][CH2:2][CH:1]=[C:4]1[C:14]2[C:9](=[N:10][CH:11]=[CH:12][CH:13]=2)[O:8][C:7]2[CH:15]=[CH:16][CH:17]=[C:18]([O:19][CH3:20])[C:6]=2[CH2:5]1

Participants

7

Reactant 4

HCID 260Hydrogen BromideHCID 962WaterHCID 14798Sodium HydroxideHCID 18675743HCID 18675743, compound

Product 1

HCID 66758260HCID 66758260, compound

Reagents, catalysts & solvents 2

HCID 176Acetic AcidSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of the product of step 1 (4.3 g) in acetic acid (30 ml) was added 48% aqueous HBr (25 ml) at 10° C. The reaction mixture was warmed to room temperature, and stirred for 12 hours. Water and ethyl acetate were added to the reaction mixture and neutralized with dilute NaOH solution. The organic layer was separated and washed with saturated aqueous sodium chloride, and dried over magnesium sulfate. The solvent was distilled off under reduced pressure. The residue was purified by silica gel chromatography eluting with ethyl acetate-hexane (1:4) to give 5-(3-bromopropylidene)-5,11-dihydro-7-methoxy[1]benzoxepino[2,3-b]pyridine (5.6 g).

Workup

  1. customThe organic layer was separated
  2. washwashed with saturated aqueous sodium chloride
  3. dry with materialdried over magnesium sulfate
  4. distillationThe solvent was distilled off under reduced pressure
  5. customThe residue was purified by silica gel chromatography
  6. washeluting with ethyl acetate-hexane (1:4)

Sources & evidence

ORD record
ord-9df495ce24554bb489e5d88ed315076e
Source dataset
uspto-grants-2011_11
Patent number
US08058287B2

Reaction notes

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