Trifluoroacetic acid → HCID 71280152, compound

HRID 246425Notes

Reaction equation

HRID 246425 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][CH2:31][CH2:32][N:33]4[CH2:38][CH2:37][O:36][CH2:35][CH2:34]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].C(O)(C(F)(F)F)=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][CH2:31][CH2:32][N:33]4[CH2:34][CH2:35][O:36][CH2:37][CH2:38]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 71279997HCID 71279997, compound

Product 1

HCID 71280152HCID 71280152, compoundYield 90.6%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Conditions

Temperature
25 °C

Procedure

To a pale yellow solution of N-tert-butyl-2-(5-(difluoromethoxy)-1-(3-morpholinopropyl)-1H-indazol-3-yl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (62 mg, 94.2 μmol) in dichloromethane (4.00 mL) was added TFA (1.48 g, 1.00 mL, 13.0 mmol38), the reaction mixture turned orange and was stirred at 25° C. for 18 h, mixture concentrated and the residue was re-dissolved in 5 mL of a solution of (dichloromethane/MeOH/ammonium hydroxide; 60:10:1) and stirred at 25° C. for 1 h, then evaporated to a yellow solid, which was dissolved in dichloromethane and purified by chromatography (spherical silica 20-45 μm, 23 g, Versaflash Supelco) eluting with 0 to 5% over 20 min (MeOH containing 10% ammonium hydroxide)/dichloromethane. The pure product dissolved in dichloromethane with few drops of MeOH and cyclohexane added to allow solid formation, light yellow flakes were separated by decantation and dried under high vacuum to give N-tert-butyl-2-(5-(difluoromethoxy)-1-(3-morpholinopropyl)-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (45 mg, 85.3 μmol, 90.5%). MS (M+H)+=528; 1H NMR (DMSO-d6) δ: 12.80 (br. s., 1H), 9.06 (s, 1H), 8.37 (s, 1H), 8.19 (s, 1H), 7.77-7.98 (m, 2H), 7.38 (d, J=8.7 Hz, 1H), 7.18 (t, J=74.4 Hz, 1H), 4.57 (t, J=5.7 Hz, 2H), 3.49 (br. s., 4H), 2.26 (br. s., 6H), 2.00-2.15 (m, 2H), 1.49 (s, 9H).

Workup

  1. concentrationmixture concentrated
  2. dissolutionthe residue was re-dissolved in 5 mL of a solution of (dichloromethane/MeOH/ammonium hydroxide; 60:10:1)
  3. stirringstirred at 25° C. for 1 h
  4. customevaporated to a yellow solid, which
  5. dissolutionwas dissolved in dichloromethane
  6. custompurified by chromatography (spherical silica 20-45 μm, 23 g, Versaflash Supelco)
  7. washeluting with 0 to 5% over 20 min (MeOH containing 10% ammonium hydroxide)/dichloromethane
  8. dissolutionThe pure product dissolved in dichloromethane with few drops of MeOH and cyclohexane
  9. additionadded
  10. customwere separated by decantation
  11. customdried under high vacuum

Sources & evidence

ORD record
ord-43035dddcca14a9cb8b4ae75eb8c26a4
Source dataset
uspto-grants-2014_02
Patent number
US08658646B2

Reaction notes

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