Ethanol → HCID 68737471, compound

HRID 220435Notes

Reaction equation

HRID 220435 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([C:14]2[C:19](Cl)=[N:18][CH:17]=[CH:16][N:15]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[F:21][C:22]([F:34])([F:33])[O:23][C:24]1[CH:29]=[CH:28][C:27](B(O)O)=[CH:26][CH:25]=1.C(O)C.C(=O)([O-])[O-].[Na+].[Na+]>C1(C)C=CC=CC=1.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>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([C:14]2[C:19]([C:27]3[CH:26]=[CH:25][C:24]([O:23][C:22]([F:21])([F:33])[F:34])=[CH:29][CH:28]=3)=[N:18][CH:17]=[CH:16][N:15]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

7

Reactant 4

HCID 702EthanolHCID 10340Sodium CarbonateHCID 27343864-(Trifluoromethoxy)phenylboronic acidHCID 11150691Tert-butyl 4-(3-chloropyrazin-2-yl)piperazine-1-carboxylate

Product 1

HCID 68737471HCID 68737471, compoundYield 94%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 1140TolueneSolvent

Procedure

Dissolve 3′-chloro-2,3,5,6-tetrahydro-[1,2′]bipyrazinyl-4-carboxylic acid t-butyl ester (0.400 g, 1.34 mmol) in toluene (2.68 mL). Add 4-(trifluoromethoxy)phenylboronic acid (0.303 g, 1.47 mmol), followed by tetrakis(triphenylphosphine)palladium(0) (0.077 g, 0.067 mmol). Add ethanol (2.68 mL), followed by a 2 N aqueous sodium carbonate solution (2.68 mL). Reflux reaction for 18 hr. Cool reaction to room temperature and concentrate. Add ethyl acetate and wash with water. Extract water layer one time with ethyl acetate. Dry (magnesium sulfate), filter, concentrate and purify (silica gel chromatography, eluting with 0:100 to 20:80 ethyl acetate:hexanes), to give 3′-(4-trifluoromethoxyphenyl)-2,3,5,6-tetrahydro-[1,2′]bipyrazinyl-4-carboxylic acid t-butyl ester (534 mg, 94%). MS (ES): m/z=425 [M+H]+.

Workup

  1. temperatureReflux
  2. customreaction for 18 hr
  3. temperatureCool
  4. customreaction to room temperature
  5. concentrationconcentrate
  6. washAdd ethyl acetate and wash with water
  7. dry with materialDry (magnesium sulfate)
  8. filtrationfilter
  9. concentrationconcentrate
  10. custompurify
  11. wash(silica gel chromatography, eluting with 0:100 to 20:80 ethyl acetate:hexanes)

Sources & evidence

ORD record
ord-08167dedf3884b50b930ec03a30eafb1
Source dataset
uspto-grants-2012_06
Patent number
US08202873B2

Reaction notes

Loading…