Hydrochloric Acid → Ethyl 2-(5-(4-Dodecylphenylsulfonamido)-1,3,4-thiadiazol-2-yl)acetate

HRID 1854266

Reaktionsgleichung

Reaktionsgleichung von HRID 1854266
[CH2:1]([C:13]1[CH:18]=[CH:17][C:16]([S:19](Cl)(=[O:21])=[O:20])=[CH:15][CH:14]=1)[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH3:12].[NH2:23][C:24]1[S:28][C:27]([CH2:29][C:30]([O:32][CH2:33][CH3:34])=[O:31])=[N:26][N:25]=1.Cl>N1C=CC=CC=1>[CH2:1]([C:13]1[CH:18]=[CH:17][C:16]([S:19]([NH:23][C:24]2[S:28][C:27]([CH2:29][C:30]([O:32][CH2:33][CH3:34])=[O:31])=[N:26][N:25]=2)(=[O:21])=[O:20])=[CH:15][CH:14]=1)[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH3:12]

Komponenten

5

Edukt 3

HCID 313Hydrochloric AcidHCID 1042154-Dodecylbenzenesulfonyl chlorideHCID 292304Ethyl 2-(5-amino-1,3,4-thiadiazol-2-yl)acetate

Produkt 1

HCID 53317119Ethyl 2-(5-(4-Dodecylphenylsulfonamido)-1,3,4-thiadiazol-2-yl)acetateAusbeute 43 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 1049PyridineLösungsmittel

Versuchsvorschrift

To a solution of p-dodecylbenzenesulfonyl chloride (1.01 g, 2.94 mmol) in pyridine (10 mL) was added ethyl 2-(5-amino-1,3,4-thiadiazol-2-yl)acetate (500 mg, 2.67 mmol). The reaction mixture was stirred at room temperature for 4.5 h, then 2 M HCl (20 mL) was added to quench the reaction. The mixture was extracted with ethyl acetate (3×50 mL). The organic extracts were washed with water (20 mL), brine (20 mL), dried over Na2SO4, filtered, and concentrated. The residue was purified by chromatography over silica gel (70-230 mesh) eluted with CH2Cl2:methanol 19:1 to give the product as a solid, mp 108-109° C., in 43% yield (570 mg, 1.15 mmol); 1H NMR (300 MHz, CDCl3) δ 0.87 (t, 3H, J=7.2 Hz), 1.24-1.34 (m, 21H), 1.55-1.66 (m, 2H), 2.63 (t, 2H, J=7.2 Hz), 3.88 (s, 2H), 4.25 (q, 2H, J=7.5 Hz), 7.25 (d, 2H, J=8.1 Hz), 7.81 (d, 2H, J=7.8 Hz); 13C NMR (75 MHz, CDCl3) δ 14.0, 14.1, 22.7, 29.3, 29.5, 29.6, 29.7, 31.2, 31.9, 35.9, 38.1, 61.9, 126.7, 128.4, 138.8, 147.2, 152.1, 168.3, 170.3; MS (LCQ, ESI+) Calcd for C24H38N3O4S2 496.2. found 496.2 (M+H)+; HRMS (ESI+, m/z) Calcd for C24H38N3O4S2 496.2304. found 496.2295 (M+H)+.

Aufarbeitung

  1. customto quench
  2. customthe reaction
  3. extractionThe mixture was extracted with ethyl acetate (3×50 mL)
  4. washThe organic extracts were washed with water (20 mL), brine (20 mL)
  5. dry with materialdried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customThe residue was purified by chromatography over silica gel (70-230 mesh)
  9. washeluted with CH2Cl2:methanol 19:1

Quellen und Nachweise

ORD-Eintrag
ord-a0da0476416044dcba05119d96691781
Quelldatensatz
uspto-grants-2015_02
Patentnummer
US08962663B2

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