m-Chloroperbenzoic acid → 4-Methyl-5-oxido-[1,3]dioxolo[4,5-c]pyridin-5-ium

HRID 1647170Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1647170
[CH3:1][C:2]1[C:7]2[O:8][CH2:9][O:10][C:6]=2[CH:5]=[CH:4][N:3]=1.C(=O)([O-])[OH:12].[Na+].C1C=C(Cl)C=C(C(OO)=O)C=1>C(Cl)Cl>[CH3:1][C:2]1[C:7]2[O:8][CH2:9][O:10][C:6]=2[CH:5]=[CH:4][N+:3]=1[O-:12]

Komponenten

5

Edukt 3

HCID 70297m-Chloroperbenzoic acid2×HCID 516892Sodium BicarbonateHCID 199264514-Methyl-[1,3]dioxolo[4,5-c]pyridine

Produkt 1

HCID 199264794-Methyl-5-oxido-[1,3]dioxolo[4,5-c]pyridin-5-ium

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

To the methylene chloride solution of 2-methyl-3,4-methylenedioxypyridine from example I 21 sodium hydrogen carbonate (1M, 50 ml) and MCPBA (4 g, 70%) were added. The mixture was stirred at ambient temperature for 15 min whereupon the excess of MCPBA was destroyed with addition of sodium thiosulphate (1 g). The organic phase was separated and the aqueous phase was extracted with methylene chloride (3×50 ml). The collected organic phases were concentrated under reduced pressure and chromatographed on silica (CH2Cl2 /MeOH, 90:10). Yield: 120 mg (7,8%) of the title compound.

Aufarbeitung

  1. customwas destroyed with addition of sodium thiosulphate (1 g)
  2. customThe organic phase was separated
  3. extractionthe aqueous phase was extracted with methylene chloride (3×50 ml)
  4. concentrationThe collected organic phases were concentrated under reduced pressure
  5. customchromatographed on silica (CH2Cl2 /MeOH, 90:10)

Quellen und Nachweise

ORD-Eintrag
ord-919326a2a7f34a9ba3ad64fc9709fe5c
Quelldatensatz
uspto-grants-1995_07
Patentnummer
US05430042

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