Pyridine → 5-Bromo-N-methyl-2-pyridinesulfonamide

HRID 476026Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 476026
[Br:1][C:2]1[CH:3]=[CH:4][C:5]([S:8](Cl)(=[O:10])=[O:9])=[N:6][CH:7]=1.[N:12]1C=CC=C[CH:13]=1.CN>C(Cl)Cl>[Br:1][C:2]1[CH:3]=[CH:4][C:5]([S:8]([NH:12][CH3:13])(=[O:10])=[O:9])=[N:6][CH:7]=1

Komponenten

5

Edukt 3

HCID 1049PyridineHCID 6329MethylamineHCID 445580975-Bromopyridine-2-sulfonyl chloride

Produkt 1

HCID 584364765-Bromo-N-methyl-2-pyridinesulfonamide

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

5-Bromo-2-pyridinesulfonyl chloride (500 mg, 1.949 mmol) was added to a 0° C. solution of pyridine (0.315 ml, 3.90 mmol), methylamine (0.975 ml, 1.949 mmol, 2M in THF) and CH2Cl2 (2 mL). The reaction mixture was stirred at room temperature for 1 hr, then quenched with brine. The contents were extracted with DCM, dried, filtered, and concentrated in vacuo. The crude product was purified by silica gel chromatography (eluent: 50%, EtOAC/CH2Cl2). The product was collected as a clear oil, 225 mg (75%). LCMS E-S (M+H)=251.1. 1H NMR (400 MHz, Chloroform-d) δ ppm 8.77 (s, 1H), 8.07 (dd, J=8.34, 2.27 Hz, 1H), 7.92 (d, J=8.34 Hz, 1H), 5.45 (d, J=5.05 Hz, 1H), 2.76 (d, 3H).

Aufarbeitung

  1. customquenched with brine
  2. extractionThe contents were extracted with DCM
  3. customdried
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. customThe crude product was purified by silica gel chromatography (eluent: 50%, EtOAC/CH2Cl2)
  7. customThe product was collected as a clear oil, 225 mg (75%)

Quellen und Nachweise

ORD-Eintrag
ord-e845220dfce3490ca1f7e02d445d7de4
Quelldatensatz
uspto-grants-2014_01
Patentnummer
US08637509B2

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