Cesium fluoride → N-(1-hydroxy-2-methylpropan-2-yl)-2-(5-methoxy-1-methyl-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide

HRID 246394Notes

Reaction equation

HRID 246394 reaction equation
[OH:1][CH2:2][C:3]([NH:6][C:7]([C:9]1[C:17]2[C:12](=[N:13][CH:14]=[C:15]([C:18]3[C:26]4[C:21](=[CH:22][CH:23]=[C:24]([O:27][CH3:28])[CH:25]=4)[N:20]([CH3:29])[N:19]=3)[N:16]=2)[N:11](COCC[Si](C)(C)C)[CH:10]=1)=[O:8])([CH3:5])[CH3:4].[F-].[Cs+].C1OCCOCCOCCOCCOCCOC1>C(#N)C.ClCCl>[OH:1][CH2:2][C:3]([NH:6][C:7]([C:9]1[C:17]2[C:12](=[N:13][CH:14]=[C:15]([C:18]3[C:26]4[C:21](=[CH:22][CH:23]=[C:24]([O:27][CH3:28])[CH:25]=4)[N:20]([CH3:29])[N:19]=3)[N:16]=2)[NH:11][CH:10]=1)=[O:8])([CH3:5])[CH3:4]

Participants

6

Reactant 3

HCID 25953Cesium fluorideHCID 2855718-Crown-6HCID 71280154N-(1-hydroxy-2-methylpropan-2-yl)-2-(5-methoxy-1-methyl-1H-indazol-3-yl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide

Product 1

HCID 71279473N-(1-hydroxy-2-methylpropan-2-yl)-2-(5-methoxy-1-methyl-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamideYield 51.7%

Reagents, catalysts & solvents 2

HCID 6342AcetonitrileSolventHCID 6344DichloromethaneSolvent

Procedure

To a solution of N-(1-hydroxy-2-methylpropan-2-yl)-2-(5-methoxy-1-methyl-1H-indazol-3-yl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (46.3 mg, 88.2 μmol) in acetonitrile (5 mL) was added CsF (134 mg, 882 μmol) and 18-crown-6 (70.0 mg, 265 μmol), the reaction mixture was heated to reflux with stirring for 48 h, reaction diluted with dichloromethane (20 mL), filtered over celite and concentrated. The residue was dissolved in dichloromethane and purified by chromatography (spherical silica 20-45 μm, 23 g, Versaflash Supelco) eluting with 0 to 5% over 15 min (MeOH containing 10% ammonium hydroxide)/dichloromethane. The pure product dissolved in dichloromethane/MeOH and cyclohexane added to allow solid formation, which was separated by decantation and dried to give N-(1-hydroxy-2-methylpropan-2-yl)-2-(5-methoxy-1-methyl-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (18 mg, 45.6 μmol, 51.7%) as a yellow solid. MS (M+H)+=377; 1H NMR (DMSO-d6) δ: 8.96 (s, 1H), 8.34 (s, 1H), 7.98 (br. s., 1H), 7.79 (br. s., 1H), 7.68 (d, J=9.1 Hz, 1H), 7.22 (d, J=8.3 Hz, 1H), 4.93 (br. s., 1H), 4.13 (s, 3H), 3.86 (s, 3H), 3.60 (d, J=4.9 Hz, 2H), 1.39 (s, 6H).

Workup

  1. temperaturethe reaction mixture was heated
  2. temperatureto reflux
  3. customreaction
  4. filtrationfiltered over celite and
  5. concentrationconcentrated
  6. dissolutionThe residue was dissolved in dichloromethane
  7. custompurified by chromatography (spherical silica 20-45 μm, 23 g, Versaflash Supelco)
  8. washeluting with 0 to 5% over 15 min (MeOH containing 10% ammonium hydroxide)/dichloromethane
  9. dissolutionThe pure product dissolved in dichloromethane/MeOH
  10. additioncyclohexane added
  11. customwas separated by decantation
  12. customdried

Sources & evidence

ORD record
ord-77742ccccc05458d98c59ee5b8f85964
Source dataset
uspto-grants-2014_02
Patent number
US08658646B2

Reaction notes

Loading…