Ammonium formate → HCID 21714313, compound

HRID 355693Notes

Reaction equation

HRID 355693 reaction equation
C([O:8][C:9]1[CH:10]=[CH:11][C:12]([CH3:23])=[C:13]2[C:17]=1[NH:16][C:15]([C:18]([O:20][CH2:21][CH3:22])=[O:19])=[CH:14]2)C1C=CC=CC=1.C([O-])=O.[NH4+]>[C].[Pd].C(O)C>[OH:8][C:9]1[CH:10]=[CH:11][C:12]([CH3:23])=[C:13]2[C:17]=1[NH:16][C:15]([C:18]([O:20][CH2:21][CH3:22])=[O:19])=[CH:14]2

Participants

5

Reactant 2

HCID 2723923Ammonium formateHCID 21714273HCID 21714273, compound

Product 1

HCID 21714313HCID 21714313, compoundYield 6.5%

Reagents, catalysts & solvents 2

HCID 178418390HCID 178418390, compoundCatalystHCID 702EthanolSolvent

Procedure

A mixture of ethyl 7-benzyloxy-4-methyl-1H-indole-2-carboxylate (15.0 g, 485 mmol), ammonium formate (30.6 g, 485 mmol), 10% palladium-carbon (2.00 g) and ethanol (450 ml) was heated under reflux for 0.5 hour. The reaction mixture was cooled to room temperature, after which the insoluble material was filtered off and the filtrate was concentrated under reduced pressure. The resulting residue was crystallized from ethyl acetate/toluene to obtain ethyl 7-hydroxy-4-methyl-1H- indole-2-carboxylate (6.96 g). M.p. 211°-212° C.

Workup

  1. temperaturewas heated
  2. temperatureunder reflux for 0.5 hour
  3. filtrationafter which the insoluble material was filtered off
  4. concentrationthe filtrate was concentrated under reduced pressure
  5. customThe resulting residue was crystallized from ethyl acetate/toluene

Sources & evidence

ORD record
ord-782a490b0c944fecac69b17fbddc7423
Source dataset
uspto-grants-1998_11
Patent number
US05834454

Reaction notes

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