Potassium Carbonate → 3-Vinylbenzo[f][1,7]naphthyridin-5-amine

HRID 1259080Notes

Reaction equation

HRID 1259080 reaction equation
Cl[C:2]1[CH:11]=[CH:10][C:9]2[C:4](=[C:5]([NH2:16])[N:6]=[C:7]3[CH:15]=[CH:14][CH:13]=[CH:12][C:8]3=2)[N:3]=1.[CH3:17][C:18]1(C)C(C)(C)OB(C=C)O1.C(=O)([O-])[O-].[K+].[K+]>C1(C)C=CC=CC=1.C(O)C.C(OCC)(=O)C.O>[CH:17]([C:2]1[CH:11]=[CH:10][C:9]2[C:4](=[C:5]([NH2:16])[N:6]=[C:7]3[CH:15]=[CH:14][CH:13]=[CH:12][C:8]3=2)[N:3]=1)=[CH2:18]

Participants

7

Reactant 3

HCID 11430Potassium CarbonateHCID 52330122-Ethenyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolaneHCID 582136303-Chlorobenzo[f][1,7]naphthyridin-5-amine

Product 1

HCID 582134833-Vinylbenzo[f][1,7]naphthyridin-5-amine

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 8857Ethyl AcetateSolventHCID 21863594Toluene ethanolSolvent

Procedure

A solution of 3-chlorobenzo[f][1,7]naphthyridin-5-amine (Example 20) (1.0 eq.), 4,4,5,5-tetramethyl-2-vinyl-1,3,2-dioxaborolane (1.2 eq.), tetrakis(triphenyl-phosphine)palladium (5 mol %), and 2N aqueous potassium carbonate solution (2.0 eq.) in toluene/ethanol (4:1, 0.1 M) was heated to 100° C. and stirred overnight. After cooling to ambient temperature, the reaction content was diluted with ethyl acetate and water. The two phases were separated, and the aqueous layer was extracted with ethyl acetate three times. The combined organic layers were washed with brine, dried over anhydrous MgSO4, and concentrated en vacuo. The crude material was purified by flash chromatography on a COMBIFLASH® system (ISCO) using 0-50% ethyl acetate in hexane to give a solid, which was then triturated in 10% ethyl acetate in hexane to give 3-vinylbenzo[f][1,7]naphthyridin-5-amine. 1H NMR (acetone d-6): δ 8.99 (d, 1H), 8.42 (d, 1H), 8.01 (d, 1H), 7.53-7.62 (m, 2H), 7.30-7.35 (dd, 1H), 7.03-7.10 (dd, 1H), 6.77 (br, 2H), 6.56 (d, 1H), 5.66 (d, 1H). LRMS [M+H]=222.1

Workup

  1. customThe two phases were separated
  2. extractionthe aqueous layer was extracted with ethyl acetate three times
  3. washThe combined organic layers were washed with brine
  4. dry with materialdried over anhydrous MgSO4
  5. concentrationconcentrated en vacuo
  6. customThe crude material was purified by flash chromatography on a COMBIFLASH® system (ISCO)
  7. customto give a solid, which
  8. customwas then triturated in 10% ethyl acetate in hexane

Sources & evidence

ORD record
ord-02415af443bd4020b502b5a933b69158
Source dataset
uspto-grants-2013_06
Patent number
US08466167B2

Reaction notes

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