Trifluoroacetic acid → 2-(1-azetidin-3-ylmethyl-6-fluoro-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid tert-butyl amide trifluoroacetate

HRID 246528Notes

Reaction equation

HRID 246528 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][C:22]([F:26])=[CH:23][CH:24]=4)[N:19]([CH2:27][CH:28]4[CH2:31][N:30](C(OC(C)(C)C)=O)[CH2:29]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].[F:47][C:48]([F:53])([F:52])[C:49]([OH:51])=[O:50]>ClCCl>[F:47][C:48]([F:53])([F:52])[C:49]([OH:51])=[O:50].[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][C:22]([F:26])=[CH:23][CH:24]=4)[N:19]([CH2:27][CH:28]4[CH2:29][NH:30][CH2:31]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 71280418tert-butyl 3-((3-(7-(tert-butylcarbamoyl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazin-2-yl)-6-fluoro-1H-indazol-1-yl)methyl)azetidine-1-carboxylate

Product 1

HCID 712800022-(1-azetidin-3-ylmethyl-6-fluoro-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid tert-butyl amide trifluoroacetateYield 17%

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)-6-fluoro-1H-indazol-1-yl)methyl)azetidine-1-carboxylate (70 mg, 107 μmol) in dichloromethane (5 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, 0-6% methanol containing 10% ammonium hydroxide in dichloromethane) followed by SFC chromatography (eluent contained TFA) gave 2-(1-azetidin-3-ylmethyl-6-fluoro-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid tert-butyl amide trifluoroacetate (10 mg, 17%). MS (M+H)+=422; 1H NMR (DMSO-d6) δ: 9.09 (s, 1H), 8.49 (dd, J=8.9, 5.4 Hz, 1H), 8.40 (s, 1H), 7.92 (s, 1H), 7.77 (dd, J=9.8, 1.9 Hz, 1H), 7.20 (d, J=2.1 Hz, 1H), 4.77 (d, J=7.0 Hz, 2H), 3.87-4.18 (m, 4H), 1.52 (s, 9H), 1.24 (d, J=4.5 Hz, 1H).

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. concentrationAfter 1 h the mixture was concentrated in vacuo
  5. customPurification by chromatography (silica, 24 g Analogix column, 0-6% methanol containing 10% ammonium hydroxide in dichloromethane)

Sources & evidence

ORD record
ord-e975fb7f42de4e66a5a9263e2b62643f
Source dataset
uspto-grants-2014_02
Patent number
US08658646B2

Reaction notes

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