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

HRID 246509Notes

Reaction equation

HRID 246509 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]([CH3:35])[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][N:33]([CH3:35])[CH2:34]4)[N:18]=3)[N:15]=2)[NH:10][CH:9]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 71279599N-tert-butyl-2-(5-(difluoromethoxy)-1-((1-methylazetidin-3-yl)methyl)-1H-indazol-3-yl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide

Product 1

HCID 712796932-[5-difluoromethoxy-1-(1-methyl-azetidin-3-ylmethyl)-1H-indazol-3-yl]-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid tert-butylamideYield 69.2%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a stirred solution of N-tert-butyl-2-(5-(difluoromethoxy)-1-((1-methylazetidin-3-yl)methyl)-1H-indazol-3-yl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (33 mg, 53.8 μmol) in dichloromethane (2 mL) was added trifluoroacetic acid (1 mL). After stirring at room temperature for 15 h the mixture was concentrated in vacuo then 25 mL of a Jan. 10, 1960 mixture of ammonium hydroxide/methanol/dichloromethane solution was added. 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-[5-difluoromethoxy-1-(1-methyl-azetidin-3-ylmethyl)-1H-indazol-3-yl]-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid tert-butylamide (18 mg, 69%). MS (M+H)+=484; 1H NMR (DMSO-d6) δ: 9.07 (s, 1H), 8.39 (s, 1H), 8.21 (d, J=2.3 Hz, 2H), 7.93 (d, J=9.0 Hz, 1H), 7.87 (s, 1H), 7.38-7.46 (m, 2H), 7.20 (s, 1H), 4.76 (d, J=7.3 Hz, 2H), 4.55 (s, 2H), 3.48 (t, J=8.0 Hz, 1H), 2.36 (s, 3H), 1.50 (s, 9H), 1.05 (t, J=7.3 Hz, 2H).

Workup

  1. concentrationwas concentrated in vacuo
  2. addition10, 1960 mixture of ammonium hydroxide/methanol/dichloromethane solution
  3. additionwas added
  4. waitAfter 1 h
  5. concentrationthe mixture was concentrated in vacuo
  6. customPurification by chromatography (silica, 24 g Analogix column, 0-4% methanol containing 10% ammonium hydroxide in dichloromethane)

Sources & evidence

ORD record
ord-f129a41e643e49ef87374ad54f807f70
Source dataset
uspto-grants-2014_02
Patent number
US08658646B2

Reaction notes

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