Sodium Carbonate → 5-((4-Morpholino-5-phenylpyridin-2-yl)amino)pyrazine-2-carbonitrile

HRID 556800Notes

Reaction equation

Cl[C:2]1[C:3]([N:17]2[CH2:22][CH2:21][O:20][CH2:19][CH2:18]2)=[CH:4][C:5]([NH:8][C:9]2[N:10]=[CH:11][C:12]([C:15]#[N:16])=[N:13][CH:14]=2)=[N:6][CH:7]=1.[C:23]1(B(O)O)[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1.C(=O)([O-])[O-].[Na+].[Na+]>C(#N)C.O>[O:20]1[CH2:21][CH2:22][N:17]([C:3]2[C:2]([C:23]3[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=3)=[CH:7][N:6]=[C:5]([NH:8][C:9]3[N:10]=[CH:11][C:12]([C:15]#[N:16])=[N:13][CH:14]=3)[CH:4]=2)[CH2:18][CH2:19]1

Participants

Conditions

Temperature: 150 °C

Procedure

A mixture of 5-(5-chloro-4-morpholinopyridin-2-ylamino)pyrazine-2-carbonitrile (50 mg, 0.16 mmol), phenylboronic acid (38 mg, 0.31 mmol), sodium carbonate (41 mg, 0.39 mmol) and Bedford catalyst (1 mg, 0.01 mmol) in a mixture of acetonitrile-water (4:1, 2.5 mL) was heated at 150° C. by microwave irradiation for 30 minutes. The crude reaction mixture was purified by ion exchange chromatography on SCX-II acidic resin (500 mg) eluting with methanol, then 2M ammonia-methanol. The basic fractions were combined and solvent was evaporated. Preparative TLC, eluting with ethyl acetate-hexane (2:3) gave 5-(4-morpholino-5-phenylpyridin-2-ylamino)pyrazine-2-carbonitrile as a yellow solid (16 mg, 28%).

Workup

customThe crude reaction mixture
customwas purified by ion exchange chromatography on SCX-II acidic resin (500 mg)
washeluting with methanol
customsolvent was evaporated
washPreparative TLC, eluting with ethyl acetate-hexane (2:3)

Sources & evidence

ORD record: ord-20fe0089f47f4b81bf8c818d3c2fd67f
Source dataset: uspto-grants-2011_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08058045B2

Reaction notes

Loading…