Sulfuric Acid → 2-(Methoxycarbonyl)-6-nitrobenzoic acid

HRID 277472

反応式

HRID 277472 の反応式
[N+:1]([C:4]1[CH:12]=[CH:11][CH:10]=[C:6]([C:7]([OH:9])=[O:8])[C:5]=1[C:13]([OH:15])=[O:14])([O-:3])=[O:2].[CH:16]([O-])([O-])OC.S(=O)(=O)(O)O>CO>[C:13]([C:5]1[C:4]([N+:1]([O-:3])=[O:2])=[CH:12][CH:11]=[CH:10][C:6]=1[C:7]([O:9][CH3:16])=[O:8])([OH:15])=[O:14]

参加物

5

反応物 3

HCID 1118Sulfuric AcidHCID 690433-Nitrophthalic acidHCID 53629101Methylorthoformate

生成物 1

HCID 43994772-(Methoxycarbonyl)-6-nitrobenzoic acid収率 82.2%

試薬・触媒・溶媒 1

HCID 887Methanol溶媒

実験手順

To a suspension of 3-nitrophthalic acid (211 g) and methyl orthoformate (127 g) in methanol (420 ml) was added conc. sulfuric acid (20 ml) dropwise with stirring. The reaction mixture was heated under reflux for 18 hours and concentrated to dryness. After addition of water (30 ml) to the residue, the mixture was stirred at 3-10° C. for one hour. The precipitated crystals were recrystallized from ethyl acetate-hexane to give pale yellow prisms (185 g, 82%), m.p. 166-1680° C.

後処理

  1. temperatureThe reaction mixture was heated
  2. temperatureunder reflux for 18 hours
  3. concentrationconcentrated to dryness
  4. additionAfter addition of water (30 ml) to the residue
  5. stirringthe mixture was stirred at 3-10° C. for one hour
  6. customThe precipitated crystals were recrystallized from ethyl acetate-hexane

出典と根拠

ORDレコード
ord-331f7b43d41c4dd8a666b98d53947c9f
出典データセット
uspto-grants-2002_03
特許番号
US06355808B2

関連ノート

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