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

HRID 259541ノート

反応式

HRID 259541 の反応式
[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

参加物

7

反応物 4

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

生成物 1

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

試薬・触媒・溶媒 2

HCID 14798Sodium Hydroxide触媒HCID 962Water溶媒

実験手順

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.

後処理

  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

出典と根拠

ORDレコード
ord-64d993bda4cc4700b6fea06edea0ec03
出典データセット
uspto-grants-1977_07
特許番号
US04038396

反応ノート

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