Potassium Carbonate → methyl 3-[methyl(propan-2-yl)amino]-2-(2-methyl-1H-indol-5-yl)quinoxaline-6-carboxylate

HRID 1403460Notes

Reaction equation

Cl[C:2]1[C:11]([N:12]([CH3:16])[CH:13]([CH3:15])[CH3:14])=[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.[CH3:21][C:22]1[NH:23][C:24]2[C:29]([CH:30]=1)=[CH:28][CH:27]=[C:26](B1OC(C)(C)C(C)(C)O1)[CH:25]=2.C([O-])([O-])=O.[K+].[K+]>COCCOC.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>[CH3:16][N:12]([CH:13]([CH3:15])[CH3:14])[C:11]1[C:2]([C:27]2[CH:28]=[C:29]3[C:24](=[CH:25][CH:26]=2)[NH:23][C:22]([CH3:21])=[CH:30]3)=[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

Participants

Conditions

Temperature: 90 °C

Procedure

To a solution of methyl 2-chloro-3-[methyl(propan-2-yl)amino]quinoxaline-6-carboxylate (200 mg, 0.68 mmol) in DME (5.0 mL) and water (2 drops) was added 2-methyl-6-(tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-indole (352 mg, 1.37 mmol), Pd(PPh3)4 (39 mg, 0.03 mmol), and K2CO3 (189 mg, 1.37 mmol) with stirring for 1 hour at 90° C. under atmosphere of nitrogen. The resulting mixture was concentrated in vacuo to give a residue, which was purified by silica gel column chromatography (1% ethyl acetate in petroleum ether) to give methyl 3-[methyl(propan-2-yl)amino]-2-(2-methyl-1H-indol-5-yl)quinoxaline-6-carboxylate as a light yellow solid (180 mg, 68%).

Workup

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

Sources & evidence

ORD record: ord-9871a7c4c9794fe6aab6aaa6b6bb20be
Source dataset: uspto-grants-2014_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08912188B2

Reaction notes

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