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Hydrochloric Acid → 2-([1,2,4]Triazolo[4,3-a]pyridin-3-yl)-8-((trans)-3-fluoropiperidin-4-yloxy)quinoline

HRID 876488
Notes
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Reaction equation

HRID 876488 reaction equation
[N:1]1[N:2]=[C:3]([C:10]2[CH:19]=[CH:18][C:17]3[C:12](=[C:13]([O:20][C@@H:21]4[CH2:26][CH2:25][N:24](C(OCC5C=CC=CC=5)=O)[CH2:23][C@H:22]4[F:37])[CH:14]=[CH:15][CH:16]=3)[N:11]=2)[N:4]2[CH:9]=[CH:8][CH:7]=[CH:6][C:5]=12.Cl.C([O-])(O)=O.[Na+].[Na+].[Cl-]>O1CCOCC1.O>[N:1]1[N:2]=[C:3]([C:10]2[CH:19]=[CH:18][C:17]3[C:12](=[C:13]([O:20][C@@H:21]4[CH2:26][CH2:25][NH:24][CH2:23][C@H:22]4[F:37])[CH:14]=[CH:15][CH:16]=3)[N:11]=2)[N:4]2[CH:9]=[CH:8][CH:7]=[CH:6][C:5]=12
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 5234Sodium ChlorideHCID 516892Sodium BicarbonateHCID 131731020(trans)-Benzyl 4-(2-([1,2,4]triazolo[4,3-a]pyridin-3-yl)quinolin-8-yloxy)-3-fluoropiperidine-1-carboxylate

Product 1

HCID 672301232-([1,2,4]Triazolo[4,3-a]pyridin-3-yl)-8-((trans)-3-fluoropiperidin-4-yloxy)quinoline

Reagents, catalysts & solvents

2
HCID 962WaterSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
100 °C

Procedure

Non-racemic (trans)-benzyl 4-(2-([1,2,4]triazolo[4,3-a]pyridin-3-yl)quinolin-8-yloxy)-3-fluoropiperidine-1-carboxylate (0.304 g, 0.611 mmol) was dissolved in dioxane (7.6 mL) and treated with 6 M hydrogen chloride (7.64 mL, 45.8 mmol), and the reaction mixture was heated at 100° C. for 15 hours. The reaction was cooled and carefully neutralized with solid NaHCO3. Additional water was added to dissolve the resulting NaCl as the neutralization proceeded. The resulting aqueous layer (pH 8-9) was extracted with methylene chloride and the combined organic layers were dried over Na2SO4 and concentrated in vacuo. The crude product was chromatographed on SiO2 eluting with a gradient of 2% NH4OH in isopropanol/methylene chloride. The desired product was isolated as a white foam (62.6 mg). MS APCI (+) m/z 364.2 (M+1) detected.

Workup

  1. temperatureThe reaction was cooled
  2. extractionThe resulting aqueous layer (pH 8-9) was extracted with methylene chloride
  3. dry with materialthe combined organic layers were dried over Na2SO4
  4. concentrationconcentrated in vacuo
  5. customThe crude product was chromatographed on SiO2 eluting with a gradient of 2% NH4OH in isopropanol/methylene chloride

Sources & evidence

ORD record
ord-35fe6c15e0a94832b9b6d32a3753f138
Source dataset
uspto-grants-2015_03
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08987251B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes