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4-(4-Fluorophenyl)piperidin-4-ol → 4-(4-Fluorophenyl)-1-[3-(trifluoromethyl)[1,2,4]triazolo[4,3-b]pyridazin-6-yl]piperidin-4-ol

HRID 2381109
Notes
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Reaction equation

HRID 2381109 reaction equation
Cl[C:2]1[CH:3]=[CH:4][C:5]2[N:6]([C:8]([C:11]([F:14])([F:13])[F:12])=[N:9][N:10]=2)[N:7]=1.[F:15][C:16]1[CH:21]=[CH:20][C:19]([C:22]2([OH:28])[CH2:27][CH2:26][NH:25][CH2:24][CH2:23]2)=[CH:18][CH:17]=1.CCN(C(C)C)C(C)C>CN(C=O)C>[F:15][C:16]1[CH:21]=[CH:20][C:19]([C:22]2([OH:28])[CH2:23][CH2:24][N:25]([C:2]3[CH:3]=[CH:4][C:5]4[N:6]([C:8]([C:11]([F:14])([F:13])[F:12])=[N:9][N:10]=4)[N:7]=3)[CH2:26][CH2:27]2)=[CH:18][CH:17]=1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 774974-(4-Fluorophenyl)piperidin-4-olHCID 81531DiisopropylethylamineHCID 6136576-Chloro-3-(trifluoromethyl)-(1,2,4)triazolo(4,3-b)pyridazine

Product 1

HCID 441258324-(4-Fluorophenyl)-1-[3-(trifluoromethyl)[1,2,4]triazolo[4,3-b]pyridazin-6-yl]piperidin-4-olYield 74.3%

Reagents, catalysts & solvents 1

HCID 6228
Dimethylformamide
Solvent

Conditions

Temperature
80 °C

Procedure

6-Chloro-3-(trifluoromethyl)-[1,2,4]triazolo[4,3-b]pyridazine (obtained as described in Monatsh. Chem. 1972, 103, 1591) (251 mg, 1.13 mmol), 4-(4-fluorophenyl)piperidin-4-ol (215 mg, 1.13 mmol) and DIPEA (0.20 mL, 1.13 mmol) in DMF (3 mL) were stirred and heated at 80° C. for 1 hour. The resulting solution was cooled to ambient temperature, and quenched with water (10 mL). The precipitated solid was collected by filtration, washed sequentially with water, acetonitrile and ether and dried under vacuum to give 4-(4-fluorophenyl)-1-[3-(trifluoromethyl)[1,2,4]triazolo[4,3-b]pyridazin-6-yl]piperidin-4-ol (320 mg, 74%).

Workup

  1. temperatureThe resulting solution was cooled to ambient temperature
  2. customquenched with water (10 mL)
  3. filtrationThe precipitated solid was collected by filtration
  4. washwashed sequentially with water, acetonitrile and ether
  5. customdried under vacuum

Sources & evidence

ORD record
ord-96ca5ab8194943d2b12139cad8da07f4
Source dataset
uspto-grants-2012_09
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08258140B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes