Ethyl Acetate → 2-(Methoxycarbonyl)-7-chloro-4-methylthioquinoline

HRID 982966Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 982966
Cl.C(C1[CH:14]=[C:13]([SH:15])[C:12]2[C:7](=[CH:8][C:9]([Cl:16])=[CH:10][CH:11]=2)[N:6]=1)(O)=O.[C:17](=O)([O-])[O-].[Cs+].[Cs+].[C:23]([O:26][CH2:27]C)(=[O:25])[CH3:24]>CN(C=O)C>[CH3:27][O:26][C:23]([C:24]1[CH:14]=[C:13]([S:15][CH3:17])[C:12]2[C:7](=[CH:8][C:9]([Cl:16])=[CH:10][CH:11]=2)[N:6]=1)=[O:25]

Komponenten

5

Edukt 3

HCID 8857Ethyl AcetateHCID 10796Cesium carbonateHCID 178479750HCID 178479750, Verbindung

Produkt 1

HCID 221848242-(Methoxycarbonyl)-7-chloro-4-methylthioquinoline

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Reaktionsbedingungen

Temperatur
70 °C

Versuchsvorschrift

To a solution of 2-carboxy-7-chloro-4-mercaptoquinoline HCl salt (75 mg, 0.31 mmol) in DMF (3 mL) was added Mel (0.0425 mL, 2.5 eq.) and cesium carbonate (340 mg, 3.5 eq.). The resulting reaction mixture was stirred at 70° C. overnight. The reaction mixture was diluted with ethyl acetate and washed with water, brine, and dried over sodium sulfate. The solvent was evaporated. Flash column chromatograpgy with 1%-2% MeOH in methylene chloride afforded 2-(methoxycarbonyl)-7-chloro-4-methylthioquinoline (40 mg). To 2-(methoxycarbonyl)-7-chloro-4-methylthioquinoline (40 mg) was added THF:H2O (2:1, 2 mL) and LiOH (10 mg, 1.5 eq.). The reaction mixture was stirred for 2 hours. The pH was adjusted to pH 4.5 with 1 N HCl. Extraction with ethyl acetate, washing with brine, drying over sodium sulfate and evaporation gave 2-carboxy-7-chloro-4-methylthioquinoline (29 mg). To a solution of 2-carboxy-7-chloro-4-methylthioquinoline (29 mg) in THF (6 mL) and DMF (1 mL) was added 4-ethoxycarbonyl-1-(1-amino-3-(1,1-dimethylethoxycarbonyl)propyl)carbonylpiperazine (46 mg, 1.1 eq.), EDCI (28 mg, 1.2 eq.), and HOBt (18 mg, 1.1 eq.). The resulting reaction mixture was stirred at ambient temperature overnight. The reaction mixture was evaporated in vacuo to afford a crude product, which was dissolved in ethyl acetate, washed with saturated NaHCO3, 1M NaHSO4 and brine. The organic layer was evaporated. Flash column chromatography with 1%-3% MeOH in CH2Cl2 afforded the product, 2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-(1,1-dimethylethoxycarbonyl)propyl]aminocarbonyl-7-chloro-4-(methylthio)quinoline (36 mg). The product (32 mg) was treated with TFA:CH2Cl2 (1:1, 1 mL) at ambient temperature for 2 hours. The solvents were then evaporated to afford the desired product, 2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-3-carboxypropyl]aminocarbonyl-7-chloro-4-(methylthio)quinoline; NMR (CDCl3) 1.35 (t, 3), 2.10 (m, 1), 2.25 (m, 1), 2.55 (m, 2), 2.7 (s, 3), 3.4-3.9 (m, 8), 4.2 (q, 2), 5.3 (m, 1), 7.55 (d, 1), 7.9 (s, 1), 8.02 (d, 1), 8.15 (s, 1) ppm.

Aufarbeitung

  1. customThe resulting reaction mixture
  2. washwashed with water, brine
  3. dry with materialdried over sodium sulfate
  4. customThe solvent was evaporated

Quellen und Nachweise

ORD-Eintrag
ord-128ca28adaac4f639b579e2123418f89
Quelldatensatz
uspto-grants-2005_03
Patentnummer
US06861424B2

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