Trifluoroacetic acid → N-(4-(1H-pyrazolo[3,4-b]pyridin-4-yloxy)-3-fluorophenylcarbamothioyl)-2-phenylacetamide

HRID 2241183Notes

Reaction equation

HRID 2241183 reaction equation
COC1C=CC(C[N:8]2[C:12]3=[N:13][CH:14]=[CH:15][C:16]([O:17][C:18]4[CH:23]=[CH:22][C:21]([NH:24][C:25]([NH:27][C:28](=[O:36])[CH2:29][C:30]5[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=5)=[S:26])=[CH:20][C:19]=4[F:37])=[C:11]3[CH:10]=[N:9]2)=CC=1.FC(F)(F)C(O)=O>>[NH:8]1[C:12]2=[N:13][CH:14]=[CH:15][C:16]([O:17][C:18]3[CH:23]=[CH:22][C:21]([NH:24][C:25]([NH:27][C:28](=[O:36])[CH2:29][C:30]4[CH:31]=[CH:32][CH:33]=[CH:34][CH:35]=4)=[S:26])=[CH:20][C:19]=3[F:37])=[C:11]2[CH:10]=[N:9]1

Participants

3

Reactant 2

HCID 6422Trifluoroacetic acidHCID 866156021-(4-(1-(4-methoxybenzyl)-1H-pyrazolo[3,4-b]pyridin-4-yloxy)-3-fluorophenyl)-3-(2-phenylacetyl)thiourea

Product 1

HCID 24876441N-(4-(1H-pyrazolo[3,4-b]pyridin-4-yloxy)-3-fluorophenylcarbamothioyl)-2-phenylacetamide

Conditions

Temperature
65 °C

Procedure

A stirred mixture of 1-(4-(1-(4-methoxybenzyl)-1H-pyrazolo[3,4-b]pyridin-4-yloxy)-3-fluorophenyl)-3-(2-phenylacetyl)thiourea (0.630 g, 1.16 mmol) and 2,2,2-trifluoroacetic acid (TFA) (1.79 mL, 23.3 mmol) was heated to 65° C. for 3 hours under N2. The mixture was concentrated in vacuo using toluene (3×5 mL) to azeotrope residual TFA. The residue was partitioned between saturated aqueous NaHCO3 (10 mL) and EtOAc (10 mL). The phases were separated, and the organic phase washed with brine (10 mL), dried (Na2SO4), filtered, and concentrated in vacuo. The residue was partially purified by preparative TLC eluting with EtOAc. The crude was then triturated with DCM (5 mL) and chilled to −10° C. to obtain the product as a white powder. The solid was suspended in abs EtOH (2×2 mL) and concentrated in vacuo to remove residual DCM. The white powder (61 mg, 12%) was then dried at 60° C. under high vacuum for 1 hour. LRMS (APCI+): 100% purity, 220 nm, m/z 422 (M+1); 1H NMR (400 MHz, DMSO-d6) δ 13.79 (s, 1H), 12.49 (s, 1H), 11.84 (s, 1H), 8.39 (d, J=5.5 Hz, 1H), 7.99 (d, J=12.1 Hz, 1H), 7.79 (s, 1H), 7.54 (m, 2H), 7.35 (m, 4H), 7.29 (m, 1H), 6.51 (d, J=5.5 Hz, 1H), 3.84 (s, 2H); 19F NMR (376 MHz, DMSO-d6) δ −129.2 (m).

Workup

  1. concentrationThe mixture was concentrated in vacuo
  2. customThe residue was partitioned between saturated aqueous NaHCO3 (10 mL) and EtOAc (10 mL)
  3. customThe phases were separated
  4. washthe organic phase washed with brine (10 mL)
  5. dry with materialdried (Na2SO4)
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo
  8. customThe residue was partially purified by preparative TLC
  9. washeluting with EtOAc
  10. customThe crude was then triturated with DCM (5 mL)
  11. temperaturechilled to −10° C.

Sources & evidence

ORD record
ord-c331cc09095e4cae8e44ce2c3e8c5c0d
Source dataset
uspto-grants-2010_05
Patent number
US07723330B2

Reaction notes

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