Potassium Phosphate, Tribasic → Methyl 3-(isopropyl(methyl)amino)-2-(4-(trifluoromethoxy)phenyl)quinoxaline-6-carboxylate

HRID 717041Notes

Reaction equation

HRID 717041 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.[F:21][C:22]([F:34])([F:33])[O:23][C:24]1[CH:29]=[CH:28][C:27](B(O)O)=[CH:26][CH:25]=1.[O-]P([O-])([O-])=O.[K+].[K+].[K+]>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.O1CCOCC1>[CH:14]([N:12]([CH3:13])[C:11]1[C:2]([C:27]2[CH:26]=[CH:25][C:24]([O:23][C:22]([F:21])([F:33])[F:34])=[CH:29][CH:28]=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

6

Reactant 3

HCID 62657Potassium Phosphate, TribasicHCID 27343864-(Trifluoromethoxy)phenylboronic acidHCID 86667203Methyl 2-chloro-3-(isopropyl(methyl)amino)quinoxaline-6-carboxylate

Product 1

HCID 67042385Methyl 3-(isopropyl(methyl)amino)-2-(4-(trifluoromethoxy)phenyl)quinoxaline-6-carboxylate

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 312751,4-DioxaneSolvent

Conditions

Temperature
100 °C

Procedure

Into a 10-mL sealed tube, was placed methyl 2-chloro-3-(isopropyl(methyl)amino)quinoxaline-6-carboxylate (200 mg, 0.68 mmol, 1.00 equiv), 4-(trifluoromethoxy)phenylboronic acid (280 mg, 1.36 mmol, 1.99 equiv), Pd(PPh3)4 (157 mg, 0.14 mmol, 0.20 equiv), K3PO4 (577 mg, 2.73 mmol, 4.01 equiv), 1,4-dioxane (4 mL). The resulting solution was stirred for overnight at 100° C. in an oil bath. The resulting mixture was concentrated under vacuum. The residue was purified by silica gel column chromatography with ethyl acetate/petroleum ether (1:40). This resulted in 120 mg (42%) of methyl 3-(isopropyl(methyl)amino)-2-(4-(trifluoromethoxy)phenyl)quinoxaline-6-carboxylate as a yellow solid.

Workup

  1. customInto a 10-mL sealed tube
  2. concentrationThe resulting mixture was concentrated under vacuum
  3. customThe residue was purified by silica gel column chromatography with ethyl acetate/petroleum ether (1:40)
  4. customThis resulted in 120 mg (42%) of methyl 3-(isopropyl(methyl)amino)-2-(4-(trifluoromethoxy)phenyl)quinoxaline-6-carboxylate as a yellow solid

Sources & evidence

ORD record
ord-509099e76c4147168069cb21edd9b2d6
Source dataset
uspto-grants-2015_11
Patent number
US09193693B2

Reaction notes

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