Hydrochloric Acid → Ethyl 6-chloro-2-({2,2,2-trifluoro-1-[3-(trifluoromethyl)phenyl]ethyl}carbamoyl)-1H-indole-5-carboxylate

HRID 514247

Reaction equation

HRID 514247 reaction equation
[Cl:1][C:2]1[CH:10]=[C:9]2[C:5]([CH:6]=[C:7]([C:11]([OH:13])=O)[NH:8]2)=[CH:4][C:3]=1[C:14]([O:16][CH2:17][CH3:18])=[O:15].[F:19][C:20]([F:34])([F:33])[CH:21]([C:23]1[CH:28]=[CH:27][CH:26]=[C:25]([C:29]([F:32])([F:31])[F:30])[CH:24]=1)[NH2:22].O.[Cl-].COC1N=C(OC)N=C([N+]2(C)CCOCC2)N=1.Cl>CN(C)C=O>[Cl:1][C:2]1[CH:10]=[C:9]2[C:5]([CH:6]=[C:7]([C:11](=[O:13])[NH:22][CH:21]([C:23]3[CH:28]=[CH:27][CH:26]=[C:25]([C:29]([F:30])([F:31])[F:32])[CH:24]=3)[C:20]([F:34])([F:33])[F:19])[NH:8]2)=[CH:4][C:3]=1[C:14]([O:16][CH2:17][CH3:18])=[O:15]

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 231494114-(4,6-Dimethoxy[1.3.5]triazin-2-yl)-4-methylmorpholinium chloride hydrateHCID 438251722,2,2-Trifluoro-1-(3-(trifluoromethyl)phenyl)ethanamineHCID 582479336-Chloro-5-(ethoxycarbonyl)-1H-indole-2-carboxylic acid

Product 1

HCID 58247983Ethyl 6-chloro-2-({2,2,2-trifluoro-1-[3-(trifluoromethyl)phenyl]ethyl}carbamoyl)-1H-indole-5-carboxylateYield 26.6%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A solution of the crude product of 6-chloro-5-(ethoxycarbonyl)-1H-indole-2-carboxylic acid (1.9 g) from Synthesis Example 1, Stage 2 and 2,2,2-trifluoro-1-[3-trifluoromethylphenyl]ethanamine (1.12 g, 4.60 mmol) (lit. DE 2723464) in N,N-dimethylformamide (15 ml) was admixed with 4-(4,6-dimethoxy[1.3.5]triazin-2-yl)-4-methylmorpholinium chloride hydrate (953 mg, 4.60 mmol), and the mixture was stirred at room temperature for 4 days. The reaction solution was admixed with hydrochloric acid (1 M) and extracted with ethyl acetate. The organic phase was washed with sat. sodium hydrogencarbonate solution and saturated sodium chloride solution, dried over sodium sulphate, filtered and concentrated to dryness under reduced pressure. Column chromatography purification on silica gel with cyclohexane/ethyl acetate as the eluent (gradient from 10% ethyl acetate to 25% ethyl acetate) gave 603 mg (26% of theory over 2 stages) of ethyl 6-chloro-2-({2,2,2-trifluoro-1-[3-(trifluoromethyl)phenyl]ethyl}carbamoyl)-1H-indole-5-carboxylate.

Workup

  1. extractionextracted with ethyl acetate
  2. washThe organic phase was washed with sat. sodium hydrogencarbonate solution and saturated sodium chloride solution
  3. dry with materialdried over sodium sulphate
  4. filtrationfiltered
  5. concentrationconcentrated to dryness under reduced pressure
  6. customColumn chromatography purification on silica gel with cyclohexane/ethyl acetate as the eluent (gradient from 10% ethyl acetate to 25% ethyl acetate)

Sources & evidence

ORD record
ord-04e7491d989b4c168fad2035db63df2c
Source dataset
uspto-grants-2015_08
Patent number
US09107411B2

Linked notes

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