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Diisopropylethylamine → 6-(3-Phenylpiperidin-1-yl)-3-(trifluoromethyl)[1,2,4]triazolo[4,3-b]pyridazine

HRID 1675109
Notes
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Reaction equation

HRID 1675109 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.[C:15]1([CH:21]2[CH2:26][CH2:25][CH2:24][NH:23][CH2:22]2)[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1.CCN(C(C)C)C(C)C>CCO>[C:15]1([CH:21]2[CH2:26][CH2:25][CH2:24][N:23]([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)[CH2:22]2)[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 81531DiisopropylethylamineHCID 1072073-PhenylpiperidineHCID 6136576-Chloro-3-(trifluoromethyl)-(1,2,4)triazolo(4,3-b)pyridazine

Product 1

HCID 591497456-(3-Phenylpiperidin-1-yl)-3-(trifluoromethyl)[1,2,4]triazolo[4,3-b]pyridazineYield 61%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent
2×

Conditions

Temperature
70 °C

Procedure

A solution of 6-chloro-3-(trifluoromethyl)-[1,2,4]triazolo[4,3-b]pyridazine (49 mg, 0.22 mmol) in EtOH (1.0 mL) was added to a mixture of 3-phenylpiperidine (53 mg, 0.33 mmol) and DIPEA (57 μL, 0.33 mmol) in EtOH (1.0 mL). The reaction mixture was heated to 70° C. overnight and the crude product was purified by preparative LCMS (Waters XBridge Prep C18 OBD column, 5μ silica, 19 mm diameter, 100 mm length), using decreasingly polar mixtures of water (containing 5% ammonia) and MeCN as eluents. Fractions containing the desired compound were evaporated to dryness to give 6-(3-phenylpiperidin-1-yl)-3-(trifluoromethyl)[1,2,4]triazolo[4,3-b]pyridazine (46 mg, 61%).

Workup

  1. customthe crude product was purified by preparative LCMS (Waters XBridge Prep C18 OBD column, 5μ silica, 19 mm diameter, 100 mm length)
  2. additionFractions containing the desired compound
  3. customwere evaporated to dryness

Sources & evidence

ORD record
ord-e5a3381e7f8f4652bbdfe336bdcda945
Source dataset
uspto-grants-2011_08
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08003649B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes