Tetrahydrofuran → 8-(1-Ethyl-propyl)-3-(5-methoxymethyl-3-methyl-thiophen-2-yl)-2,6-dimethyl-imidazo[1,2-b]pyridazine

HRID 1432610Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1432610
Br[C:2]1[S:6][C:5]([C:7]2[N:11]3[N:12]=[C:13]([CH3:21])[CH:14]=[C:15]([CH:16]([CH2:19][CH3:20])[CH2:17][CH3:18])[C:10]3=[N:9][C:8]=2[CH3:22])=[C:4]([CH3:23])[CH:3]=1.C1[CH2:28][O:27][CH2:26]C1.C([Li])CCC.ICOC>CCOC(C)=O>[CH2:17]([CH:16]([C:15]1[C:10]2[N:11]([C:7]([C:5]3[S:6][C:2]([CH2:26][O:27][CH3:28])=[CH:3][C:4]=3[CH3:23])=[C:8]([CH3:22])[N:9]=2)[N:12]=[C:13]([CH3:21])[CH:14]=1)[CH2:19][CH3:20])[CH3:18]

Komponenten

6

Edukt 4

HCID 8028TetrahydrofuranHCID 139376Iodomethyl methyl etherHCID 579329433-(5-Bromo-3-methyl-thiophen-2-yl)-8-(1-ethyl-propyl)-2,6-dimethyl-imidazo[1,2-b]pyridazineHCID 178418339Butyllithium

Produkt 1

HCID 579330158-(1-Ethyl-propyl)-3-(5-methoxymethyl-3-methyl-thiophen-2-yl)-2,6-dimethyl-imidazo[1,2-b]pyridazineAusbeute 44 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

To a −78° C. solution of 3-(5-bromo-3-methyl-thiophen-2-yl)-8-(1-ethyl-propyl)-2,6-dimethyl-imidazo[1,2-b]pyridazine (0.30 g, 0.76 mmol) and THF (3 mL) is added 1.34 M n-Bu-Li (0.50 mL, 0.80 mmol). After 30 minutes iodo-methoxy-methane (0.097 mL, 1.15 mmol) is added and the solution warmed to ambient temperature. After 1 hour the solution is diluted with EtOAc (40 mL) washed with water (30 mL), brine (30 mL), dried over MgSO4, filtered and concentrated. The residue is purified by ISCO column chromatography (15%-20% EtOAc/hexane gradient) furnish the title compound (0.12 g, 0.34 mmol, 44%). 1H NMR (CDCl3), δ 0.87 (t, J=7.5 Hz, 6H), 1.72-1.90 (m, 4H), 2.09 (s, 3H), 2.45 (s, 3H), 2.49 (s, 3H), 3.28-3.37 (m, 1H), 3.44 (s, 3H), 4.61 (s, 2H), 6.65 (s, 1H), 6.93 (s, 1H). LC/MS (m/z): calcd. for C20H27N3OS (M+H)+: 358.3; found: 358.3.

Aufarbeitung

  1. washwashed with water (30 mL), brine (30 mL)
  2. dry with materialdried over MgSO4
  3. filtrationfiltered
  4. concentrationconcentrated
  5. customThe residue is purified by ISCO column chromatography (15%-20% EtOAc/hexane gradient)

Quellen und Nachweise

ORD-Eintrag
ord-c56ebcf8b6074bb6a97c073cd97a3213
Quelldatensatz
uspto-grants-2009_11
Patentnummer
US07612067B2

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