Trifluoroacetic acid → N-tert-butyl-2-(methyl(pyridin-3-yl)amino)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide

HRID 522987

Reaction equation

HRID 522987 reaction equation
[C:1]([NH:5][C:6]([C:8]1[C:16]2[C:11](=[N:12][CH:13]=[C:14]([N:17]([CH3:24])[C:18]3[CH:19]=[N:20][CH:21]=[CH:22][CH:23]=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]([N:17]([CH3:24])[C:18]3[CH:19]=[N:20][CH:21]=[CH:22][CH:23]=3)[N:15]=2)[NH:10][CH:9]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 90041212N-tert-butyl-2-(methyl(pyridin-3-yl)amino)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide

Product 1

HCID 73295951N-tert-butyl-2-(methyl(pyridin-3-yl)amino)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamideYield 59%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

N-tert-butyl-2-(methyl(pyridin-3-yl)amino)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (38 mg, 83.6 μmol) was dissolved in dichloromethane (1.5 mL) and treated with trifluoroacetic acid (191 mg, 129 μL, 1.67 mmol). After 16 h, the mixture was concentrated and the residue re-dissolved in dichloromethane (1.5 mL), methanol (0.75 mL) and ammonium hydroxide (0.2 mL) and the mixture stirred at room temperature for 1 h. The mixture was concentrated then triturated with water and filtered to obtain a solid. This was washed with ether then dried to give N-tert-butyl-2-(methyl(pyridin-3-yl)amino)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (16 mg, 49.3 μmol, 59%) as a light yellow solid. 1H NMR (400 MHz, DMSO-d) δ ppm: 12.33 (s, 1H), 8.64 (d, J=2.5, 1 H), 8.40 (dd, J=4.7, 1.2, 1 H), 8.05 (d, J=3.1, 1 H), 7.96 (s, 1H), 7.92 (s, 1H), 7.82 (m, 1H), 7.46 (m, 1H), 3.50 (s, 3H), 1.32 (s, 9H); MS (EI/CI) m/z: 325.1 [M+H].

Workup

  1. concentrationthe mixture was concentrated
  2. dissolutionthe residue re-dissolved in dichloromethane (1.5 mL)
  3. concentrationThe mixture was concentrated
  4. customthen triturated with water
  5. filtrationfiltered
  6. customto obtain a solid
  7. washThis was washed with ether
  8. customthen dried

Sources & evidence

ORD record
ord-30a7237b828a4d21aef5c77f1fb6d6cb
Source dataset
uspto-grants-2016_05
Patent number
US09334278B2

Linked notes

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