Thiodiglycol → 2-(2-Hydroxyethylthio)ethyl (2S)-2-(6-methoxy(2-naphthyl))propanoate

HRID 414926

Reaktionsgleichung

Reaktionsgleichung von HRID 414926
[CH3:1][O:2][C:3]1[CH:4]=[C:5]2[C:10](=[CH:11][CH:12]=1)[CH:9]=[C:8]([C@H:13]([CH3:17])[C:14]([OH:16])=[O:15])[CH:7]=[CH:6]2.[S:18]([CH2:22][CH2:23]O)[CH2:19][CH2:20][OH:21].Cl.CN(C)CCCN=C=NCC.CCOCC.CCCCCC>ClCCl>[CH3:1][O:2][C:3]1[CH:4]=[C:5]2[C:10](=[CH:11][CH:12]=1)[CH:9]=[C:8]([C@H:13]([CH3:17])[C:14]([O:16][CH2:23][CH2:22][S:18][CH2:19][CH2:20][OH:21])=[O:15])[CH:7]=[CH:6]2

Komponenten

6

Edukt 4

HCID 5447ThiodiglycolHCID 156391NaproxenHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 21584099Diethylether hexane

Produkt 1

HCID 210759292-(2-Hydroxyethylthio)ethyl (2S)-2-(6-methoxy(2-naphthyl))propanoateAusbeute 81,5 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

To a solution of (2S)-2-(6-methoxy(2-naphthyl))propanoic acid (naproxen, 15.0 g, 65 mmol), 2,2′-thiodiethanol (40 g, 325 mmol) and N,N-dimethylaminopyridine (DMAP, 1.59 g, 13 mmol) in dichloromethane (400 mL) at room temperature was added 1-(3-(dimethylamino)propyl)-3-ethylcarbodiimide hydrochloride (EDAC, 14.98g, 78 mmol) as a solid, in portions. After stirring for 3 hours at room temperature, TLC analysis indicated the reaction was complete. The reaction mixture was partitioned between CH2Cl2 and water, and the water layer was washed with more CH2Cl2. The combined organic layer was washed with water, 0.1 N HCl, water, brine, and dried over magnesium sulfate. The solution was concentrated under vacuum, and the residue was purified via column chromatography, 5% ethyl acetate/dichloromethane. The appropriate fractions were combined, and the solvent evaporated. Trituration of the residue with ether/hexane gave the title compound as a white solid (17.72 g, 81% yield). Mp 58-61° C. 1H NMR (300 MHz, CDCl3) δ 7.70 (d, J=8.6 Hz, 2H), 7.67 (d, J=0.9 Hz, 1H), 7.40 (dd, J=1.7, 8.5 Hz, 1H), 7.14 (dd, J=2.5, 8.8 Hz, 1H), 7.11 (d, J=2.5 Hz, 1H), 4.24 (t, J=6.7 Hz, 2H), 3.86 (q, J=7.2 Hz, 1H), 3.60 (app q, J=6.0 Hz, 2H), 2.69 (t, J=6.6 Hz, 2H), 2.61 (t, J=5.9 Hz, 2H), 2.00 (t, J=6.2 Hz, 1H), 1.59 (d, J=7.2 Hz, 3H). Mass spectrum (API-TIS) m/z 352 (MNH4+); Anal. calcd. for C18H22O4S: C, 64.65; H, 6.63; S, 9.59; Found: C, 64.62; H, 6.59; S, 9.47.

Aufarbeitung

  1. customThe reaction mixture was partitioned between CH2Cl2 and water
  2. washthe water layer was washed with more CH2Cl2
  3. washThe combined organic layer was washed with water, 0.1 N HCl, water, brine
  4. dry with materialdried over magnesium sulfate
  5. concentrationThe solution was concentrated under vacuum
  6. customthe residue was purified via column chromatography, 5% ethyl acetate/dichloromethane
  7. customthe solvent evaporated

Quellen und Nachweise

ORD-Eintrag
ord-59628f3e3a754912acca6d943aa966b4
Quelldatensatz
uspto-grants-2012_01
Patentnummer
US08088762B2

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