Sulfuric Acid → Oxazolo[4,5-b]pyridin-2-yl(phenyl)methanone

HRID 66352Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 66352
[CH2:1]([C:8]1[O:9][C:10]2[C:11]([N:16]=1)=[N:12][CH:13]=[CH:14][CH:15]=2)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[Mn]([O-])(=O)(=O)=[O:18].[K+].S(=O)(=O)(O)O.S(=O)(O)[O-].[Na+]>[OH-].[Na+].O>[C:1]([C:8]1[O:9][C:10]2[C:11]([N:16]=1)=[N:12][CH:13]=[CH:14][CH:15]=2)(=[O:18])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Komponenten

7

Edukt 4

HCID 1118Sulfuric AcidHCID 516875Potassium PermanganateHCID 227548052-Benzyloxazolo[4,5-b]pyridineHCID 23665763Sodium Bisulfite

Produkt 1

HCID 22754809Oxazolo[4,5-b]pyridin-2-yl(phenyl)methanone

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 14798Sodium HydroxideKatalysatorHCID 962WaterLösungsmittel

Versuchsvorschrift

A mixture of 800 mg. of 2-benzyloxazolo[4,5-b]pyridine, 2.5 g. of potassium permanganate, 35 ml. of water and 6 drops of 2.5 N sodium hydroxide solution was heated at 50°-55° C. for 3 hours. After cooling, sulfuric acid was added to about pH 6 and sufficient sodium bisulfite was added to remove the manganese dioxide. The crystalline precipitate remaining was collected and recrystallized from ethylacetate to give 2-benzoyloxazolo[4,5-b]pyridine, m.p. 151°-153° C.

Aufarbeitung

  1. additionA mixture of 800 mg
  2. temperatureAfter cooling
  3. additionwas added
  4. customto remove the manganese dioxide
  5. customThe crystalline precipitate remaining was collected
  6. customrecrystallized from ethylacetate

Quellen und Nachweise

ORD-Eintrag
ord-c32ca1f760c7496791ecdcdf0b8c4ce7
Quelldatensatz
uspto-grants-1978_12
Patentnummer
US04131677

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