Nitric Acid → 7-Bromo-4-hydroxy-3-nitrocoumarin

HRID 1283315ノート

反応式

HRID 1283315 の反応式
[N+:1]([O-:4])(O)=[O:2].[Br:5][C:6]1[CH:15]=[C:14]2[C:9]([C:10]([OH:17])=[CH:11][C:12](=[O:16])[O:13]2)=[CH:8][CH:7]=1>C(Cl)(Cl)Cl>[Br:5][C:6]1[CH:15]=[C:14]2[C:9]([C:10]([OH:17])=[C:11]([N+:1]([O-:4])=[O:2])[C:12](=[O:16])[O:13]2)=[CH:8][CH:7]=1

参加物

4

反応物 2

HCID 944Nitric AcidHCID 546962297-Bromo-4-hydroxycoumarin

生成物 1

HCID 547109707-Bromo-4-hydroxy-3-nitrocoumarin

試薬・触媒・溶媒 1

HCID 6212Chloroform溶媒

実験手順

Fuming nitric acid (27 ml) was added to a stirred suspension of 7-bromo-4-hydroxycoumarin (m.p. 247.5°-248.5°; 4.18g) in chloroform (400 ml) at room temperature over 1.5 hours. After a further 1.5 hours, the solvent was removed in vacuo at room temperature and 6N hydrochloric acid (100 ml) added to the residue. Filtration gave the product, m.p. 155°-7°, (C9H4NO5Br requires C, 37.79; H, 1.41; N. 4.90; Br, 27.94. Found: C, 37.46; H, 1.45; N, 4.78; Br, 27.93).

後処理

  1. customthe solvent was removed in vacuo at room temperature
  2. addition6N hydrochloric acid (100 ml) added to the residue
  3. filtrationFiltration
  4. customgave the product, m.p. 155°-7°, (C9H4NO5Br requires C, 37.79; H, 1.41; N. 4.90; Br, 27.94. Found: C, 37.46; H, 1.45; N, 4.78; Br, 27.93)

出典と根拠

ORDレコード
ord-8ea962e6b1d041a9b171c6fddc4b0713
出典データセット
uspto-grants-1976_08
特許番号
US03974289

反応ノート

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