Sodium Bicarbonate → 2-(2-Formamidothiazol-4-yl)-2-(4-bromo-3-hydroxybenzyloxyimino)acetic acid

HRID 2412802ノート

反応式

HRID 2412802 の反応式
P(O)(O)(O)=O.[Br:6][C:7]1[CH:15]=[CH:14][C:10]([CH2:11][O:12][NH2:13])=[CH:9][C:8]=1[OH:16].C(=O)(O)[O-].[Na+].[CH:22]([NH:24][C:25]1[S:26][CH:27]=[C:28]([C:30](=O)[C:31]([OH:33])=[O:32])[N:29]=1)=[O:23]>O.C(O)C>[CH:22]([NH:24][C:25]1[S:26][CH:27]=[C:28]([C:30](=[N:13][O:12][CH2:11][C:10]2[CH:14]=[CH:15][C:7]([Br:6])=[C:8]([OH:16])[CH:9]=2)[C:31]([OH:33])=[O:32])[N:29]=1)=[O:23]

参加物

6

反応物 3

HCID 516892Sodium BicarbonateHCID 13116693(2-Formamido-1,3-thiazol-4-yl)(oxo)acetic acidHCID 236167634-Bromo-3-hydroxybenzyloxyamine phosphate

生成物 1

HCID 540633902-(2-Formamidothiazol-4-yl)-2-(4-bromo-3-hydroxybenzyloxyimino)acetic acid収率 74%

試薬・触媒・溶媒 2

HCID 702Ethanol溶媒HCID 962Water溶媒

実験手順

The solution of 4-bromo-3-hydroxybenzyloxyamine phosphate (17.4 g.) in water (200 ml.) and ethanol (200 ml.) was stirred at room temperature and adjusted to pH 7.0 with sodium bicarbonate. 2-(2-Formamidothiazol-4-yl)glyoxylic acid (10.0 g.) was added to the solution and the resulting suspension was adjusted to pH 4.0 to 4.5. After stirring the solution at room temperature for 2 hours, ethanol was removed from the resultant solution in vacuo. Ethyl acetate was added to aqueous residue and adjusted to pH 2.5 with 10% hydrochloric acid. The ethyl acetate layer was separated, washed with water and dried over magnesium sulfate. The solution was concentrated in vacuo to give 2-(2-formamidothiazol-4-yl)-2-(4-bromo-3-hydroxybenzyloxyimino)acetic acid (syn isomer, 14.8 g.).

後処理

  1. customethanol was removed from the resultant solution in vacuo
  2. additionEthyl acetate was added to aqueous residue
  3. customThe ethyl acetate layer was separated
  4. washwashed with water
  5. dry with materialdried over magnesium sulfate
  6. concentrationThe solution was concentrated in vacuo

出典と根拠

ORDレコード
ord-33b2e6c0bf3448a5ba4515cceecebc57
出典データセット
uspto-grants-1985_01
特許番号
US04493833

反応ノート

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