Acetic Acid → HCID 67263525, compound

HRID 1688009Notes

Reaction equation

HRID 1688009 reaction equation
[N+:1]([C:4]1[CH:5]=[CH:6][C:7]2[O:13][CH2:12][CH2:11][CH2:10][NH:9][C:8]=2[CH:14]=1)([O-:3])=[O:2].[CH:15](=O)[CH3:16].C(O)(=O)C.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].C(=O)(O)[O-].[Na+]>C(#N)C.C(OCC)(=O)C>[CH2:15]([N:9]1[C:8]2[CH:14]=[C:4]([N+:1]([O-:3])=[O:2])[CH:5]=[CH:6][C:7]=2[O:13][CH2:12][CH2:11][CH2:10]1)[CH3:16]

Participants

8

Reactant 5

HCID 176Acetic AcidHCID 177AcetaldehydeHCID 516892Sodium BicarbonateHCID 5049666Sodium triacetoxyborohydrideHCID 109871302,3,4,5-Tetrahydro-7-nitro-1,5-benzoxazepine

Product 1

HCID 67263525HCID 67263525, compoundYield 85.6%

Reagents, catalysts & solvents 2

HCID 6342AcetonitrileSolventHCID 8857Ethyl AcetateSolvent

Procedure

2-Nitro-6,7,8,9-tetrahydro-5-oxa-9-aza-benzocycloheptene (278 mg, 1.43 mmol) was dissolved in Acetonitrile (15 mL) and Acetaldehyde (0.80 mL, 14 mmol) was added. Acetic acid (0.15 mL, 2.6 mmol) was added, followed by Sodium triacetoxyborohydride (0.85 g, 4.0 mmol), and the mixture was stirred under an atmosphere of Nitrogen at room temperature for 1 h. The solution was diluted with ethyl acetate (50 mL) and satd. sodium bicarbonate (50 mL). The layers were separated, the organic washed with brine (50 mL) and dried over sodium sulfate. Conc. in vacuo followed by chromatography (ISCO, g SiO2, 0-50% EtOAc:Hex) afforded 9-Ethyl-2-nitro-6,7,8,9-tetrahydro-5-oxa-9-aza-benzocycloheptene as an orange oil (272 mg, 85%). 1H-NMR (CDCl3) 7.58 (m, 2H), 6.87 (d, 1H, J=8.1 Hz), 4.31 (t, 2H, J=5.2 Hz), 3.40 (t, 2H, J=5.2 Hz), 3.33 (q, 2H, J=6.8 Hz), 2.05 (tt, 2H, J=5.2, 5.2 Hz), 1.24 (t, 3H, J=6.8 Hz).

Workup

  1. customThe layers were separated
  2. washthe organic washed with brine (50 mL)
  3. dry with materialdried over sodium sulfate

Sources & evidence

ORD record
ord-30202f3c0a0d4e2880739522e66da40b
Source dataset
uspto-grants-2012_04
Patent number
US08148391B2

Reaction notes

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