Water → {4-[4-(5-Methyl-1-phenyl-1H-pyrazol-4-ylmethyl)-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-3'-yl]-phenyl}-methanol hydrochloride

HRID 220584Notes

Reaction equation

HRID 220584 reaction equation
[Cl:1][C:2]1[C:3]([N:8]2[CH2:13][CH2:12][N:11]([CH2:14][C:15]3[CH:16]=[N:17][N:18]([C:21]4[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=4)[C:19]=3[CH3:20])[CH2:10][CH2:9]2)=[N:4][CH:5]=[CH:6][N:7]=1.C(=O)([O-])[O-].[K+].[K+].[OH:33][CH2:34][C:35]1[CH:40]=[CH:39][C:38](B(O)O)=[CH:37][CH:36]=1.O>CN(C)C(=O)C.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[ClH:1].[CH3:20][C:19]1[N:18]([C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=2)[N:17]=[CH:16][C:15]=1[CH2:14][N:11]1[CH2:12][CH2:13][N:8]([C:3]2[C:2]([C:38]3[CH:39]=[CH:40][C:35]([CH2:34][OH:33])=[CH:36][CH:37]=3)=[N:7][CH:6]=[CH:5][N:4]=2)[CH2:9][CH2:10]1

Participants

7

Reactant 4

HCID 962WaterHCID 11430Potassium CarbonateHCID 27347064-(Hydroxymethyl)benzeneboronic acid2×HCID 866416633'-chloro-4-(5-methyl-1-phenyl-1H-pyrazol-4-ylmethyl)-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl

Product 1

HCID 68594884{4-[4-(5-Methyl-1-phenyl-1H-pyrazol-4-ylmethyl)-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-3'-yl]-phenyl}-methanol hydrochlorideYield 57%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 31374DimethylacetamideSolvent

Procedure

Combine 3′-chloro-4-(5-methyl-1-phenyl-1H-pyrazol-4-ylmethyl)-3,4,5,6-tetrahydro-2H-[1,2′]bipyrazinyl (0.290 g, 0.786 mmol), potassium carbonate (0.261 g, 1.89 mmol), 4-(hydroxymethyl)phenylboronic acid (0.143 g, 0.943 mmol), and tetrakis(triphenylphosphine)palladium(0) (0.009 g, 0.008 mmol) in N,N-dimethylacetamide (1.6 mL). Add water (790 μL), and reflux reaction for 18 hr. Add 4-(hydroxymethyl)phenylboronic acid (0.072 g, 0.471 mmol) and tetrakis(triphenyl-phosphine)palladium(0) (0.009 g, 0.008 mmol) and heat to 110° C. for 3.5 hr. Add DCM and wash with water. Extract water layer three times with DCM. Dry combined organics (magnesium sulfate) and purify (silica gel chromatography, eluting with 50:50 to 100:0 ethyl acetate:hexanes then 10:90 methanol:ethyl acetate), to give the free base of the title compound (198 mg, 57%). Dissolve the free base (0.195 g, 0.443 mmol) in acetonitrile (531 μL) and add aq. 1 N HCl solution (531 μL, 0.531 mmol). Shake for 15 min. at ambient temperature. Freeze dry to give the title compound (208 mg, 98%). MS (ES): m/z=441 [M+H]+.

Workup

  1. customreaction for 18 hr
  2. washAdd DCM and wash with water
  3. customDry
  4. custompurify (silica gel chromatography
  5. washeluting with 50:50 to 100:0 ethyl acetate

Sources & evidence

ORD record
ord-25b92712a1a84f638c9fad12ba733247
Source dataset
uspto-grants-2012_06
Patent number
US08202873B2

Reaction notes

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