Potassium Carbonate → Ethyl [(2-(2,2-diphenylethyl)thio-4,5-dihydronaphtho[1,2-d]thiazol-6-yl)oxy]acetate

HRID 1067444Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1067444
[CH2:1]([O:3][C:4](=[O:21])[CH2:5][O:6][C:7]1[CH:20]=[CH:19][CH:18]=[C:17]2[C:8]=1[CH2:9][CH2:10][C:11]1[S:15][C:14]([SH:16])=[N:13][C:12]=12)[CH3:2].CS(O[CH2:27][CH:28]([C:35]1[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=1)[C:29]1[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=1)(=O)=O.C(=O)([O-])[O-].[K+].[K+]>CN(C)C=O.O>[CH2:1]([O:3][C:4](=[O:21])[CH2:5][O:6][C:7]1[CH:20]=[CH:19][CH:18]=[C:17]2[C:8]=1[CH2:9][CH2:10][C:11]1[S:15][C:14]([S:16][CH2:27][CH:28]([C:29]3[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=3)[C:35]3[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=3)=[N:13][C:12]=12)[CH3:2]

Komponenten

6

Edukt 3

HCID 11430Potassium CarbonateHCID 117478202,2-Diphenylethyl methanesulfonateHCID 178472952Ethyl[(2-mercapto-4,5-dihydronaphtho[1,2-d]thiazol-6-yl)oxy)acetate

Produkt 1

HCID 11134900Ethyl [(2-(2,2-diphenylethyl)thio-4,5-dihydronaphtho[1,2-d]thiazol-6-yl)oxy]acetateAusbeute 96,1 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 6228DimethylformamideLösungsmittel

Reaktionsbedingungen

Temperatur
60 °C

Versuchsvorschrift

To a solution of ethyl[(2-mercapto-4,5-dihydronaphtho[1,2-d]thiazol-6-yl)oxy]acetate (1.80 g, 5.60 mmol) in N,N-dimethylformamide (15 mL) was added 2,2-diphenylethyl methanesulfonate (1.80 g, 6.20 mmol) followed by addition of potassium carbonate (857 mg, 6.20 mmol), and the mixture was stirred at 60° C. for 2 hours. This reaction mixture was diluted with water and extracted with ethyl acetate. The organic layer was washed with water and saturated aqueous sodium chloride solution, dried over MgSO4, and filtered. The filtrate was concentrated under reduced pressure to provide 2.70 g of ethyl[[2-(2,2-diphenylethyl)thio-4,5-dihydronaphtho[1,2-d]thiazol-6-yl]oxy]acetate. To a solution of this compound (2.00 g, 3.99 mmol) in ethanol (8 mL)-water (2 mL) was added sodium periodate (4.30 g, 19.9 mmol) and the mixture was refluxed for 14 hours. This reaction mixture was diluted with ethyl acetate and water and, after phase separation, the aqueous layer was extracted with ethyl acetate. The pooled organic solution was washed with water, dried over MgSO4, and filtered and the filtrate was concentrated under reduced pressure. To a solution of the above concentration residue in tetrahydrofuran (16 mL)-methanol (4 mL) was added 1N-aqueous sodium hydroxide solution (2 mL) dropwise, and the mixture was stirred at room temperature for 10 minutes. The solvent was then distilled off under reduced pressure. To the residue was added 1N-hydrochloric acid, and the mixture was extracted with ethyl acetate. The organic layer was washed with water and saturated aqueous sodium chloride solution, dried over MgSO4, and filtered and the filtrate was concentrated under reduced pressure. The residue was recrystallized from ethyl acetate-hexane to provide 0.72 g of the title compound. Yield 41%.

Aufarbeitung

  1. extractionextracted with ethyl acetate
  2. washThe organic layer was washed with water and saturated aqueous sodium chloride solution
  3. dry with materialdried over MgSO4
  4. filtrationfiltered
  5. concentrationThe filtrate was concentrated under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-d2bdaaf35d4b4229b7d2681bf26d2793
Quelldatensatz
uspto-grants-2001_06
Patentnummer
US06248766B1

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