5-Amino-3-methylisoxazole → N-(3-methyl-5-isoxazolyl)-5-bromothiophene-2-sulfonamide

HRID 234449

反応式

HRID 234449 の反応式
[Br:1][C:2]1[S:6][C:5]([S:7](Cl)(=[O:9])=[O:8])=[CH:4][CH:3]=1.[NH2:11][C:12]1[O:16][N:15]=[C:14]([CH3:17])[CH:13]=1>>[CH3:17][C:14]1[CH:13]=[C:12]([NH:11][S:7]([C:5]2[S:6][C:2]([Br:1])=[CH:3][CH:4]=2)(=[O:9])=[O:8])[O:16][N:15]=1

参加物

3

反応物 2

HCID 845905-Amino-3-methylisoxazoleHCID 27339245-Bromothiophene-2-sulfonyl chloride

生成物 1

HCID 22998516N-(3-methyl-5-isoxazolyl)-5-bromothiophene-2-sulfonamide

実験手順

N-(3-methyl-5-isoxazolyl)-5-bromothiophene-2-sulfonamide was prepared in the same manner as described in Example 14 from 5-bromothiophene-2-sulfonyl chloride and 5-amino-3-methyl isoxazole. Purification was achieved by extraction of the crude sulfonamide into aqueous 2N NaOH, washing of the aqueous layer with ethyl acetate and acidification, using concentrated HCl, to pH ~2. Re-extraction into ethyl acetate was followed by washing of the organic material with water, brine and drying over magnesium sulfate. After evaporation of solvents, a brownish solid remained which was sufficiently pure to use in the next step.

後処理

  1. customPurification
  2. extractionwas achieved by extraction of the crude sulfonamide into aqueous 2N NaOH
  3. washwashing of the aqueous layer with ethyl acetate and acidification
  4. washby washing of the organic material with water, brine
  5. dry with materialdrying over magnesium sulfate
  6. customAfter evaporation of solvents

出典と根拠

ORDレコード
ord-f241abfbf55942dcb756a89925fcb51b
出典データセット
uspto-grants-1997_01
特許番号
US05594021

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