Potassium Phosphate, Tribasic → (S)-4-Chloro-N2-[1-(4-fluorophenyl)ethyl]-N6-(pyrazin-2-yl)pyridine-2,6-diamine

HRID 2043391Notes

Reaction equation

[Cl:1][C:2]1[CH:7]=[C:6](Cl)[N:5]=[C:4]([NH:9][C@H:10]([C:12]2[CH:17]=[CH:16][C:15]([F:18])=[CH:14][CH:13]=2)[CH3:11])[CH:3]=1.[NH2:19][C:20]1[CH:25]=[N:24][CH:23]=[CH:22][N:21]=1.P([O-])([O-])([O-])=O.[K+].[K+].[K+]>O1CCOCC1>[Cl:1][C:2]1[CH:7]=[C:6]([NH:19][C:20]2[CH:25]=[N:24][CH:23]=[CH:22][N:21]=2)[N:5]=[C:4]([NH:9][C@H:10]([C:12]2[CH:17]=[CH:16][C:15]([F:18])=[CH:14][CH:13]=2)[CH3:11])[CH:3]=1

Participants

Conditions

Temperature: 100 °C

Procedure

To 734 mg of (S)-4,6-dichloro-N-[1-(4-fluorophenyl)ethyl]pyridine-2-amine, 343 mg of 2-aminopyrazine, 1.39 g of tripotassium phosphate, 190 mg of 4,5-bis(diphenylphosphino)-9,9′-dimethylxanthene and 170 mg of tris(dibenzylideneacetone)(chloroform)dipalladium was added 17 ml of 1,4-dioxane, the mixture was subjected to degassing and was substituted with argon, and was stirred at 100° C. for 19 hours. The reaction solution was diluted with ethyl acetate. The solution was washed in turn with water and brine and then dried over magnesium sulfate. The solvent was distilled off under reduced pressure, and then the obtained residue was purified by silica gel column chromatography to obtain 654 mg of the objective compound as brown powder.

Workup

customto degassing
additionThe reaction solution was diluted with ethyl acetate
washThe solution was washed in turn with water and brine
dry with materialdried over magnesium sulfate
distillationThe solvent was distilled off under reduced pressure
customthe obtained residue was purified by silica gel column chromatography

Sources & evidence

ORD record: ord-f4ae293cef8c4f9c9e0def1e4f47bc86
Source dataset: uspto-grants-2013_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08586591B2

Reaction notes

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