Trifluoroacetic acid → 2-(1-azetidin-3-ylmethyl-5-difluoromethoxy-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid tert-butylamide

HRID 246530Notes

Reaction equation

HRID 246530 reaction equation
[C:1]([NH:5][C:6]([C:8]1[C:16]2[C:11](=[N:12][CH:13]=[C:14]([C:17]3[C:25]4[C:20](=[CH:21][CH:22]=[C:23]([O:26][CH:27]([F:29])[F:28])[CH:24]=4)[N:19]([CH2:30][CH:31]4[CH2:34][N:33](C(OC(C)(C)C)=O)[CH2:32]4)[N:18]=3)[N:15]=2)[N:10](COCC[Si](C)(C)C)[CH:9]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2].FC(F)(F)C(O)=O>ClCCl>[C:1]([NH:5][C:6]([C:8]1[C:16]2[C:11](=[N:12][CH:13]=[C:14]([C:17]3[C:25]4[C:20](=[CH:21][CH:22]=[C:23]([O:26][CH:27]([F:28])[F:29])[CH:24]=4)[N:19]([CH2:30][CH:31]4[CH2:32][NH:33][CH2:34]4)[N:18]=3)[N:15]=2)[NH:10][CH:9]=1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 71280303tert-butyl 3-((3-(7-(tert-butylcarbamoyl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazin-2-yl)-5-(difluoromethoxy)-1H-indazol-1-yl)methyl)azetidine-1-carboxylate

Product 1

HCID 712797072-(1-azetidin-3-ylmethyl-5-difluoromethoxy-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid tert-butylamideYield 41.1%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a stirred solution of tert-butyl 3-((3-(7-(tert-butylcarbamoyl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazin-2-yl)-5-(difluoromethoxy)-1H-indazol-1-yl)methyl)azetidine-1-carboxylate (80 mg, 114 μmol) in dichloromethane (2 mL) was added trifluoroacetic acid (1 mL). After 15 h the mixture was concentrated in vacuo and the residue dissolved in 25 mL of a Jan. 10, 1960 mixture of ammonium hydroxide/methanol/dichloromethane. After 1 h, the mixture was concentrated in vacuo. Purification by chromatography (silica, 24 g Analogix column, 0-4% methanol containing 10% ammonium hydroxide in dichloromethane) gave 2-(1-azetidin-3-ylmethyl-5-difluoromethoxy-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid tert-butylamide (22 mg, 41%).

Workup

  1. concentrationAfter 15 h the mixture was concentrated in vacuo
  2. dissolutionthe residue dissolved in 25 mL of a Jan
  3. addition10, 1960 mixture of ammonium hydroxide/methanol/dichloromethane
  4. concentrationthe mixture was concentrated in vacuo
  5. customPurification by chromatography (silica, 24 g Analogix column, 0-4% methanol containing 10% ammonium hydroxide in dichloromethane)

Sources & evidence

ORD record
ord-74b20ad2ccab44a1a957fbd1336f6b65
Source dataset
uspto-grants-2014_02
Patent number
US08658646B2

Reaction notes

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