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

HRID 631058

Reaktionsgleichung

Reaktionsgleichung von HRID 631058
[C:1]([NH:4][C:5]1[CH:10]=[CH:9][C:8]([S:11](Cl)(=[O:13])=[O:12])=[CH:7][CH:6]=1)(=[O:3])[CH3:2].[NH2:15][C:16]1[S:20][C:19]([CH2:21][C:22]([O:24][CH2:25][CH3:26])=[O:23])=[N:18][N:17]=1.Cl>N1C=CC=CC=1>[C:1]([NH:4][C:5]1[CH:10]=[CH:9][C:8]([S:11]([NH:15][C:16]2[S:20][C:19]([CH2:21][C:22]([O:24][CH2:25][CH3:26])=[O:23])=[N:18][N:17]=2)(=[O:13])=[O:12])=[CH:7][CH:6]=1)(=[O:3])[CH3:2]

Komponenten

5

Edukt 3

HCID 313Hydrochloric AcidHCID 8481N-Acetylsulfanilyl chlorideHCID 292304Ethyl 2-(5-amino-1,3,4-thiadiazol-2-yl)acetate

Produkt 1

HCID 53323731Ethyl 2-(5-(4-Acetamidophenylsulfonamido)-1,3,4-thiadiazol-2-yl)acetateAusbeute 76 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 1049PyridineLösungsmittel

Versuchsvorschrift

To a solution of p-acetamidobenzenesulfonyl chloride (275 mg, 1.18 mmol) in pyridine (5 mL) was added ethyl 2-(5-amino-1,3,4-thiadiazol-2-yl)acetate (200 mg, 1.07 mmol). The reaction mixture was stirred at room temperature for 4.5 h, then 2 M HCl (10 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 156-157° C., in 76% yield (312 mg, 0.81 mmol); 1H NMR (300 MHz, DMSO-d6) δ 1.20 (t, 3H, J=7.0 Hz), 2.07 (s, 3H), 4.06 (s, 2H), 4.15 (q, 2H, J=7.0 Hz), 7.72 (m, 4H), 10.29 (s, 1H); 13C NMR (75 MHz, DMSO-d6) δ 14.0, 24.1, 35.7, 61.3, 118.6, 127.0, 135.5, 142.9, 151.6, 167.8, 168.1, 169.0; MS (LCQ, ESI+) Calcd for C14H17N4O5S2 385.1. found 385.1 (M+H)+. HRMS (ESI+, m/z) Calcd for C14H17N4O5S2 385.0640. found 385.0638 (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-d0925ff2e9654c52a60f879165916ec3
Quelldatensatz
uspto-grants-2016_04
Patentnummer
US09320734B2

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