4-Hydroxymethylpyridine → Ethyl 5-trifluoromethyl-1-[(pyrid-4-yl)methyl]-1H-indole-2-carboxylate

HRID 1880659Notes

Reaction equation

HRID 1880659 reaction equation
N(C(N1CCCCC1)=O)=NC(N1CCCCC1)=O.[F:19][C:20]([F:36])([F:35])[C:21]1[CH:22]=[C:23]2[C:27](=[CH:28][CH:29]=1)[NH:26][C:25]([C:30]([O:32][CH2:33][CH3:34])=[O:31])=[CH:24]2.[N:37]1[CH:42]=[CH:41][C:40]([CH2:43]O)=[CH:39][CH:38]=1.C(P(CCCC)CCCC)CCC>C1(C)C=CC=CC=1>[F:36][C:20]([F:35])([F:19])[C:21]1[CH:22]=[C:23]2[C:27](=[CH:28][CH:29]=1)[N:26]([CH2:43][C:40]1[CH:41]=[CH:42][N:37]=[CH:38][CH:39]=1)[C:25]([C:30]([O:32][CH2:33][CH3:34])=[O:31])=[CH:24]2

Participants

6

Reactant 4

HCID 114724-HydroxymethylpyridineHCID 13831TributylphosphineHCID 730421,1'-(Azodicarbonyl)dipiperidineHCID 17389890Ethyl 5-(trifluoromethyl)-1H-indole-2-carboxylate

Product 1

HCID 68431838Ethyl 5-trifluoromethyl-1-[(pyrid-4-yl)methyl]-1H-indole-2-carboxylateYield 77.5%

Reagents, catalysts & solvents 1

HCID 1140TolueneSolvent2×

Procedure

A solution of 1.47 g (5.83 mmol) of 1,1′-(azodicarbonyl)dipiperidine in 50 ml of toluene is added dropwise to a solution of 1 g (3.89 mmol) of ethyl 5-trifluoromethyl-1H-indole-2-carboxylate, 0.63 g (5.83 mmol) of 4-pyridylcarbinol and 1.46 ml (5.83 mmol) of tributylphosphine in 50 ml of toluene. The reaction mixture is stirred overnight at room temperature and then concentrated under reduced pressure and chromatographed on a column of silica (eluent: dichloromethane/methanol). 1.05 g of expected product are obtained.

Workup

  1. concentrationconcentrated under reduced pressure
  2. customchromatographed on a column of silica (eluent: dichloromethane/methanol)

Sources & evidence

ORD record
ord-18f0bcb4503e486da3373a82a7b28c87
Source dataset
uspto-grants-2012_11
Patent number
US08318775B2

Reaction notes

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