Ammonium formate → HCID 58653653, compound

HRID 1676024Notes

Reaction equation

HRID 1676024 reaction equation
[N:1]1([C:10]([C:17]2[CH:22]=[CH:21][C:20]([CH2:23][CH3:24])=[CH:19][CH:18]=2)=[CH:11][C:12]([O:14][CH2:15][CH3:16])=[O:13])[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[CH:2]1.C([O-])=O.[NH4+]>C(O)C.O.[Pd]>[N:1]1([CH:10]([C:17]2[CH:22]=[CH:21][C:20]([CH2:23][CH3:24])=[CH:19][CH:18]=2)[CH2:11][C:12]([O:14][CH2:15][CH3:16])=[O:13])[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[CH:2]1

Participants

6

Reactant 2

HCID 2723923Ammonium formateHCID 67351942HCID 67351942, compound

Product 1

HCID 58653653HCID 58653653, compound

Reagents, catalysts & solvents 3

HCID 23938PalladiumCatalystHCID 702EthanolSolventHCID 962WaterSolvent

Procedure

To a solution of ethyl 3-(1H-benzimidazol-1-yl)-3-(4-ethylphenyl)-2-propenoate (E/Z mixture, 181 mg, 566 μmol) in a mixture of ethanol and water (10:1, 2.75 mL) was added palladium on carbon (27 mg, 10% w/w Pd) and ammonium formate (143 mg, 2.26 mmol). The suspension was brought to reflux for 3 hours, cooled to room temperature, and was filtered through a pad of Celite® and evaporated in vacuo. The residue was purified by flash column chromatography on silica gel, eluting with a mixture of dichloromethane and methanol (96:4) to afford the title compound, 1H NMR: (CDCl3), 8.03 (s, 1H), (d, J=6.96, 1H), 7.31-7.06 (m, 7H), 6.01 (dd, J=8.79, 6.59, 1H), 4.04 (t, J=6.96, 2H), 3.38 (dd, J=15.75, 8.79, 1H), 3.31 (dd, J=15.75, 6.59, 1H), 2.62 (q, J=7.69, 2H), 1.18 (t, J=7.69, 3H), 1.09 (t, J=6.96, 3H).

Workup

  1. temperatureto reflux for 3 hours
  2. filtrationwas filtered through a pad of Celite®
  3. customevaporated in vacuo
  4. customThe residue was purified by flash column chromatography on silica gel
  5. washeluting with a mixture of dichloromethane and methanol (96:4)

Sources & evidence

ORD record
ord-7d575dad8b5243e99819e789233d1dda
Source dataset
uspto-grants-2011_08
Patent number
US08003806B2

Reaction notes

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