Tetrahydrofuran → tert-Butyl [5-({2-[(tert-butoxycarbonyl)amino]-5-nitrophenyl}ethynyl)pyridin-3-yl]carbamate

HRID 541885

Reaktionsgleichung

Reaktionsgleichung von HRID 541885
I[C:2]1[CH:7]=[C:6]([N+:8]([O-:10])=[O:9])[CH:5]=[CH:4][C:3]=1[NH:11][C:12](=[O:18])[O:13][C:14]([CH3:17])([CH3:16])[CH3:15].O1CCCC1.[C:24]([C:26]1[CH:27]=[C:28]([NH:32][C:33](=[O:39])[O:34][C:35]([CH3:38])([CH3:37])[CH3:36])[CH:29]=[N:30][CH:31]=1)#[CH:25]>[Cu]I.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.C(N(CC)CC)C>[C:14]([O:13][C:12]([NH:11][C:3]1[CH:4]=[CH:5][C:6]([N+:8]([O-:10])=[O:9])=[CH:7][C:2]=1[C:25]#[C:24][C:26]1[CH:27]=[C:28]([NH:32][C:33](=[O:39])[O:34][C:35]([CH3:37])([CH3:36])[CH3:38])[CH:29]=[N:30][CH:31]=1)=[O:18])([CH3:17])([CH3:16])[CH3:15]

Komponenten

7

Edukt 3

HCID 8028TetrahydrofuranHCID 7098713Tert-butyl 4-nitro-2-iodophenylcarbamateHCID 57962286Tert-butyl (5-ethynylpyridin-3-yl)carbamate

Produkt 1

HCID 57961805tert-Butyl [5-({2-[(tert-butoxycarbonyl)amino]-5-nitrophenyl}ethynyl)pyridin-3-yl]carbamateAusbeute 85,9 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)KatalysatorHCID 178418476HCID 178418476, VerbindungKatalysatorHCID 8471TriethylamineLösungsmittel

Versuchsvorschrift

Into the reaction flask was added tert-butyl (2-iodo-4-nitrophenyl)carbamate (1.5 g, 4.1 mmol) and copper(I) iodide (0.031 g, 0.16 mmol), bis(triphenylphosphine)palladium(II) chloride (0.12 g, 0.16 mmol), tetrahydrofuran (10 mL), and triethylamine (0.63 mL). The mixture was stirred under bubbling N2 for 5 min, and tert-butyl (5-ethynylpyridin-3-yl)carbamate (0.90 g, 4.1 mmol) was then added. The reaction mixture was stirred at 65° C. for 1 h. After concentration, the residue was diluted with EtOAc and water. The aqueous layer was extracted again with EtOAc. The organic layers were combined and dried over Na2SO4. After filtration and concentration, the crude was purified by silica gel column chromatography to give the desired product (1.6 g, 85%). LCMS for C23H27N4O6 (M+H)+: m/z=455.1.

Aufarbeitung

  1. stirringThe reaction mixture was stirred at 65° C. for 1 h
  2. concentrationAfter concentration
  3. additionthe residue was diluted with EtOAc and water
  4. extractionThe aqueous layer was extracted again with EtOAc
  5. dry with materialdried over Na2SO4
  6. filtrationAfter filtration and concentration
  7. customthe crude was purified by silica gel column chromatography

Quellen und Nachweise

ORD-Eintrag
ord-35cd0205c64f46ebb284da88f40a808b
Quelldatensatz
uspto-grants-2014_10
Patentnummer
US08871753B2

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