Hydrochloric Acid → 2-Chloro-5-sulfino-benzoic acid

HRID 32664

反応式

HRID 32664 の反応式
S([O-])([O-])=O.[Na+].[Na+].[Cl:7][C:8]1[CH:16]=[CH:15][C:14]([S:17](F)(=[O:19])=[O:18])=[CH:13][C:9]=1[C:10]([OH:12])=[O:11].[OH-].[Na+].Cl>O>[Cl:7][C:8]1[CH:16]=[CH:15][C:14]([S:17]([OH:19])=[O:18])=[CH:13][C:9]=1[C:10]([OH:12])=[O:11]

参加物

6

反応物 4

HCID 313Hydrochloric AcidHCID 14798Sodium HydroxideHCID 24437Sodium SulfiteHCID 888732-Chloro-5-(fluorosulpho)benzoic acid

生成物 1

HCID 151129042-Chloro-5-sulfino-benzoic acid収率 76.5%

試薬・触媒・溶媒 1

HCID 962Water溶媒2 回

実験手順

A solution of 33.59 g (267 mmol) sodium sulfite in 100 ml water at 0° C. is treated with 21.2 g (89 mmol) 2-Chloro-5-fluorosulfonyl-benzoic acid and 26.6 ml of a 10M aqueous NaOH solution (267 mmol). The mixture was allowed to stirr for 3 h at room temperature, acidified with HCl conc. (pH=4) and water was removed under vacuum. Methanol was added, the precipitate filtered off and the filtrate concentrated. Methanol and diethylether were added and the precipitate was filtered off washed with ether and dried to yield 15 g (76.5%) of the title compound as white gum. MS (m/e): 219.1 (MH−, 100%)

後処理

  1. customwas removed under vacuum
  2. additionMethanol was added
  3. filtrationthe precipitate filtered off
  4. concentrationthe filtrate concentrated
  5. additionMethanol and diethylether were added
  6. filtrationthe precipitate was filtered off
  7. washwashed with ether
  8. customdried

出典と根拠

ORDレコード
ord-ddda5ef23f3d423d8332ec0fccf56639
出典データセット
uspto-grants-2008_09
特許番号
US07427612B2

関連ノート

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