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Potassium Carbonate → Ethyl 4-((5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethynyl)-3-methylbenzoate

HRID 1259157
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Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1259157
Cl[C:2]1[CH:3]=[C:4]([C:10]#[C:11][C:12]2[CH:22]=[CH:21][C:15]([C:16]([O:18][CH2:19][CH3:20])=[O:17])=[CH:14][C:13]=2[CH3:23])[CH:5]=[N:6][C:7]=1[C:8]#[N:9].[CH3:24][C:25]1[CH:26]=[CH:27][C:28](B2OC(C)(C)C(C)(C)O2)=[C:29]([NH:31]C(=O)OC(C)(C)C)[CH:30]=1.C(=O)([O-])[O-].[K+].[K+]>C1(C)C=CC=CC=1.C(O)C.CO.C(Cl)Cl.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>[NH2:9][C:8]1[C:7]2[N:6]=[CH:5][C:4]([C:10]#[C:11][C:12]3[CH:22]=[CH:21][C:15]([C:16]([O:18][CH2:19][CH3:20])=[O:17])=[CH:14][C:13]=3[CH3:23])=[CH:3][C:2]=2[C:28]2[CH:27]=[CH:26][C:25]([CH3:24])=[CH:30][C:29]=2[N:31]=1
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Komponenten

8

Edukt 3

HCID 11430Potassium CarbonateHCID 46737997tert-Butyl (5-methyl-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)carbamateHCID 66875033Ethyl 4-((5-chloro-6-cyanopyridin-3-yl)ethynyl)-3-methylbenzoate

Produkt 1

HCID 66892595Ethyl 4-((5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethynyl)-3-methylbenzoate

Reagenzien, Katalysatoren, Lösungsmittel 4

HCID 178418397
HCID 178418397, Verbindung
Katalysator
HCID 887MethanolLösungsmittel
HCID 6344DichloromethaneLösungsmittel
HCID 21863594Toluene ethanolLösungsmittel

Versuchsvorschrift

A solution of ethyl 4-((5-chloro-6-cyanopyridin-3-yl)ethynyl)-3-methylbenzoate (from the previous step) (1.0 eq.), tert-butyl 5-methyl-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenylcarbamate (from Example 5/Step 2) (1.1 eq.), tetrakis(triphenylphosphine)palladium (8 mol %), and potassium carbonate (3.0 eq.) in toluene/ethanol (9:1, 0.2 M) was stirred at 100° C. overnight. After cooling to ambient temperature, the reaction mixture was diluted with 2% MeOH in DCM. The two phases were separated. The combined organic layers were washed with brine, dried over anhydrous MgSO4, and concentrated en vaccuo. The crude material was purified by flash chromatography on a COMBIFLASH® system (ISCO) using 0-40% ethyl acetate in toluene to give ethyl 4-((5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethynyl)-3-methylbenzoate.

Aufarbeitung

  1. customwas stirred at 100° C. overnight
  2. customThe two phases were separated
  3. washThe combined organic layers were washed with brine
  4. dry with materialdried over anhydrous MgSO4
  5. concentrationconcentrated en vaccuo
  6. customThe crude material was purified by flash chromatography on a COMBIFLASH® system (ISCO)

Quellen und Nachweise

ORD-Eintrag
ord-229e3ab613224000993a4b5edd94e084
Quelldatensatz
uspto-grants-2013_06
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08466167B2

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