Hydrochloric Acid → HCID 66601838, compound

HRID 604317Notes

Reaction equation

HRID 604317 reaction equation
[C-:1]#[N:2].[Na+].[CH3:4][N:5]1[C:9]([CH3:10])=[C:8]([CH2:11][N:12]2[CH2:17][CH2:16][N:15]([C:18]3[C:23]([N:24]4[CH2:29][CH2:28][CH:27]([CH2:30]OS(C5C=CC(C)=CC=5)(=O)=O)[CH2:26][CH2:25]4)=[N:22][CH:21]=[CH:20][N:19]=3)[CH2:14][CH2:13]2)[CH:7]=[N:6]1.[ClH:42]>CS(C)=O.C(#N)C>[ClH:42].[CH3:4][N:5]1[C:9]([CH3:10])=[C:8]([CH2:11][N:12]2[CH2:17][CH2:16][N:15]([C:18]3[C:23]([N:24]4[CH2:25][CH2:26][CH:27]([CH2:30][C:1]#[N:2])[CH2:28][CH2:29]4)=[N:22][CH:21]=[CH:20][N:19]=3)[CH2:14][CH2:13]2)[CH:7]=[N:6]1

Participants

6

Reactant 3

HCID 313Hydrochloric AcidHCID 8929Sodium CyanideHCID 59438232HCID 59438232, compound

Product 1

HCID 66601838HCID 66601838, compoundYield 101.4%

Reagents, catalysts & solvents 2

HCID 679Dimethyl SulfoxideSolventHCID 6342AcetonitrileSolvent

Conditions

Temperature
50 °C

Procedure

Add sodium cyanide (78.46 mg, 1.60 mmol, 2.4 eq) to a solution of toluene-4-sulfonic acid 1-[4-(1,5-dimethyl-1H-pyrazol-4-ylmethyl)-3,4,5,6-tetrahydro-2H-[1,2′]bipyrazinyl-3′-yl]-piperidin-4-ylmethyl ester (0.36 g, 0.667 mmol, 1 eq) in dimethyl sulfoxide (5 mL). Heat the solution to 50° C. with stirring for 5.75 hr. and then cool to room temperature. Add water (20 mL) and extract the aqueous layer three times with DCM (20 mL). Combine the organic extracts, dry over magnesium sulphate, filter and concentrate. Purify by flash chromatography on a 40 g silica gel column, eluting with a gradient of 2-10% methanol in DCM. Further purify by high pH reverse phase HPLC (UV guided). Dissolve this material (148 mg, 0.38 mmol) in the minimum quantity of 50% aqueous acetonitrile. Add 2M aqueous hydrogen chloride (190 μL, 0.38 mmol) and lyophilize to give {1-[4-(1,5-dimethyl-1H-pyrazol-4-ylmethyl)-3,4,5,6-tetrahydro-2H-[1,2′]bipyrazinyl-3′-yl]-piperidin-4-yl}-acetonitrile hydrochloride (166 mg, 58%). MS (m/z): 395.2 (M+1).

Workup

  1. temperatureand then cool to room temperature
  2. extractionAdd water (20 mL) and extract the aqueous layer three times with DCM (20 mL)
  3. dry with materialCombine the organic extracts, dry over magnesium sulphate
  4. filtrationfilter
  5. concentrationconcentrate
  6. customPurify by flash chromatography on a 40 g silica gel column
  7. washeluting with a gradient of 2-10% methanol in DCM
  8. customFurther purify by high pH reverse phase HPLC (UV guided)

Sources & evidence

ORD record
ord-4f4b763ceb5a470e955dd8d1f0885bbd
Source dataset
uspto-grants-2011_03
Patent number
US07910588B2

Reaction notes

Loading…