Trifluoroacetic acid → 5-(5-fluoropyridin-3-yl)-N-(6-(trifluoromethyl)pyridin-3-yl)-1H-indazole-3-carboxamide

HRID 1507122Notes

Reaction equation

HRID 1507122 reaction equation
C(O)(C(F)(F)F)=O.[F:8][C:9]1[CH:10]=[C:11]([C:15]2[CH:16]=[C:17]3[C:21](=[CH:22][CH:23]=2)[N:20](C2CCCCO2)[N:19]=[C:18]3[C:30]([NH:32][C:33]2[CH:34]=[N:35][C:36]([C:39]([F:42])([F:41])[F:40])=[CH:37][CH:38]=2)=[O:31])[CH:12]=[N:13][CH:14]=1.C([SiH](CC)CC)C>C(Cl)Cl>[F:8][C:9]1[CH:10]=[C:11]([C:15]2[CH:16]=[C:17]3[C:21](=[CH:22][CH:23]=2)[NH:20][N:19]=[C:18]3[C:30]([NH:32][C:33]2[CH:34]=[N:35][C:36]([C:39]([F:42])([F:40])[F:41])=[CH:37][CH:38]=2)=[O:31])[CH:12]=[N:13][CH:14]=1

Participants

5

Reactant 3

HCID 6422Trifluoroacetic acidHCID 12052TriethylsilaneHCID 866796995-(5-fluoropyridin-3-yl)-1-(tetrahydro-2H-pyran-2-yl)-N-(6-(trifluoromethyl)pyridin-3-yl)-1H-indazole-3-carboxamide

Product 1

HCID 866797005-(5-fluoropyridin-3-yl)-N-(6-(trifluoromethyl)pyridin-3-yl)-1H-indazole-3-carboxamideYield 21%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

TFA (10 mL) was added to a solution of 5-(5-fluoropyridin-3-yl)-1-(tetrahydro-2H-pyran-2-yl)-N-(6-(trifluoromethyl)pyridin-3-yl)-1H-indazole-3-carboxamide (CXXX) (0.420 g, 0.86 mmol) and triethylsilane (0.345 mL, 2.16 mmol) in DCM (10 mL) and stirred 5 h at room temperature. The solvent was removed under vacuum. The residue was treated with water, sonicated briefly to disperse the solids, basified to pH 9.0 with 5 N NH4OH and sonicated again. The solids were filtered, washed with cold water and air dried at room temperature. The solids were suspended in DCM:MeOH (1:1) mixture and boiled to get a clear solution. The solution was cooled to room temperature. The solids formed were filtered washed with DCM and dried under vacuum at room temperature to get 5-(5-fluoropyridin-3-yl)-N-(6-(trifluoromethyl)pyridin-3-yl)-1H-indazole-3-carboxamide (2) as a white solid (72.9 mg, 0.18 mmol, 21% yield). 1H NMR (DMSO-d6) δ ppm 14.13 (br. s, 1H), 11.11 (s, 1H), 9.27 (d, J=1.8 Hz, 1H), 8.84 (m, 1H), 8.63 (dd, J=6.8, 1.8 Hz, 1H), 8.60 (d, J=2.0 Hz, 1H), 8.53 (m, 1H), 8.14-8.11 (m, 1H), 7.94 (d, J=6.9 Hz, 1H), 7.90-7.83 (m, 2H); ESIMS found for C19H11F4N5O m/z 402.30 (M+H).

Workup

  1. customThe solvent was removed under vacuum
  2. additionThe residue was treated with water
  3. customsonicated briefly
  4. additionto disperse the solids
  5. customsonicated again
  6. filtrationThe solids were filtered
  7. washwashed with cold water and air
  8. customdried at room temperature
  9. customto get a clear solution
  10. temperatureThe solution was cooled to room temperature
  11. customThe solids formed
  12. filtrationwere filtered
  13. washwashed with DCM
  14. customdried under vacuum at room temperature

Sources & evidence

ORD record
ord-c0eab6ca4e484a819d33e64a2aa97803
Source dataset
uspto-grants-2015_12
Patent number
US09221793B2

Reaction notes

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