Potassium Phosphate, Tribasic → HCID 70664867, compound

HRID 1403592Notes

Reaction equation

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

Participants

Conditions

Temperature: 95 °C

Procedure

To a solution of methyl 3-(isopropyl(methyl)amino)-7-methoxy-2-(trifluoromethylsulfonyloxy)quinoxaline-6-carboxylate (2.5 g, crude) in dioxane (5.0 mL) and water (3 drops) was added (4-fluorophenyl)boronic acid (2.40 g, 17.15 mmol), Pd(PPh3)4 (320 mg, 0.28 mmol), and K3PO4 (3.58 g, 16.87 mmol) with stirring for 1.5 h at 95° C. under an atmosphere of nitrogen. The reaction mixture was concentrated in vacuo to give a residue, which was purified via silica gel column chromatography (1% ethyl acetate in petroleum ether) to afford methyl 2-(4-fluorophenyl)-3-(isopropyl(methyl)amino)-7-methoxyquinoxaline-6-carboxylate as a light yellow solid (0.9 g, 36% 2 steps).

Workup

concentrationThe reaction mixture was concentrated in vacuo
customto give a residue, which
customwas purified via silica gel column chromatography (1% ethyl acetate in petroleum ether)

Sources & evidence

ORD record: ord-d73c09d564c54a949674e3481d64014b
Source dataset: uspto-grants-2014_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08912188B2

Reaction notes

Loading…