Potassium Phosphate, Tribasic → HCID 70664642, compound

HRID 1403300Notes

Reaction equation

Cl[C:2]1[C:11]([N:12]([CH:14]([CH3:16])[CH3:15])[CH3:13])=[N:10][C:9]2[C:4](=[CH:5][CH:6]=[C:7]([C:17]([O:19][CH3:20])=[O:18])[CH:8]=2)[N:3]=1.[O-]P([O-])([O-])=O.[K+].[K+].[K+].[CH3:29][O:30][C:31]1[N:36]=[CH:35][C:34](B(O)O)=[CH:33][CH:32]=1>O1CCOCC1.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:14]([N:12]([CH3:13])[C:11]1[C:2]([C:34]2[CH:35]=[N:36][C:31]([O:30][CH3:29])=[CH:32][CH:33]=2)=[N:3][C:4]2[C:9]([N:10]=1)=[CH:8][C:7]([C:17]([O:19][CH3:20])=[O:18])=[CH:6][CH:5]=2)([CH3:16])[CH3:15]

Participants

Conditions

Temperature: 90 °C

Procedure

To a solution of methyl 2-chloro-3-(isopropyl(methyl)amino)quinoxaline-6-carboxylate (Scheme I, 120 mg, 0.41 mmol) in dioxane (3 mL) was added K3PO4 (257 mg, 1.22 mmol), 6-methoxypyridin-3-ylboronic acid (187 mg, 1.22 mmol) and Pd(PPh3)4 (23.54 mg, 0.02 mmol) with stirring for 1 h at 90° C. in an oil bath with an inert atmosphere of nitrogen. The reaction mixture was concentrated under vacuum to get a residue, which was purified by a silica gel column with 1%-2% ethyl acetate in petroleum ether to afford methyl 3-(isopropyl(methyl)amino)-2-(6-methoxypyridin-3-yl)quinoxaline-6-carboxylate as a light yellow solid (120 mg, 80%).

Workup

concentrationThe reaction mixture was concentrated under vacuum
customto get a residue, which
customwas purified by a silica gel column with 1%-2% ethyl acetate in petroleum ether

Sources & evidence

ORD record: ord-2375ac48f81541879070812a66b1012d
Source dataset: uspto-grants-2014_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08912188B2

Reaction notes

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