Ethyl Acetate → 3-[6-(Cyclohexyloxy)pyridin-3-yl]pyrazin-2-amine

HRID 1622689Notes

Reaction equation

Cl[C:2]1[C:3]([NH2:8])=[N:4][CH:5]=[CH:6][N:7]=1.[CH:9]1([O:15][C:16]2[N:21]=[CH:20][C:19](B(O)O)=[CH:18][CH:17]=2)[CH2:14][CH2:13][CH2:12][CH2:11][CH2:10]1.C(=O)([O-])[O-].[Na+].[Na+].CCOC(C)=O>COCCOC.O.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>[CH:9]1([O:15][C:16]2[N:21]=[CH:20][C:19]([C:2]3[C:3]([NH2:8])=[N:4][CH:5]=[CH:6][N:7]=3)=[CH:18][CH:17]=2)[CH2:14][CH2:13][CH2:12][CH2:11][CH2:10]1

Participants

Conditions

Temperature: 90 °C

Procedure

Tetrakis(triphenylphosphine)palladium(0) (53.5 mg) was added to a suspension of 3-chloropyrazin-2-amine (200 mg), 6-(cyclohexyloxy)pyridin-3-ylboronic acid (375 mg) and sodium carbonate (327 mg) in DME (5 mL) and water (1 mL) and the mixture was stirred at 90° C. under nitrogen for 3 hr. Water and EtOAc were added and the organic layer was separated, washed with brine, dried over anhydrous sodium sulfate and concentrated in vacuo. The residue was purified by column chromatography (silica gel, eluted with EtOAc in hexane) and washed with IPE to give the title compound (332 mg) as brown gum.

Workup

customthe organic layer was separated
washwashed with brine
dry with materialdried over anhydrous sodium sulfate
concentrationconcentrated in vacuo
customThe residue was purified by column chromatography (silica gel, eluted with EtOAc in hexane)
washwashed with IPE

Sources & evidence

ORD record: ord-3dd1162dd921459f977327b3ac0b5e49
Source dataset: uspto-grants-2014_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08778934B2

Reaction notes

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