Trifluoroacetic acid → 7-Amino-3vinyl-3-cephem-4-carboxylic acid

HRID 569353

反応式

HRID 569353 の反応式
C(=[N:8][CH:9]1[C:34](=[O:35])[N:11]2[C:12]([C:18]([O:20]C(C3C=CC=CC=3)C3C=CC=CC=3)=[O:19])=[C:13]([CH:16]=[CH2:17])[CH2:14][S:15][C@H:10]12)C1C=CC=CC=1.FC(F)(F)C(O)=O.C(=O)(O)[O-].[Na+].C(=O)([O-])[O-].[Na+].[Na+]>C1(OC)C=CC=CC=1.C(OCC)(=O)C>[NH2:8][CH:9]1[C:34](=[O:35])[N:11]2[C:12]([C:18]([OH:20])=[O:19])=[C:13]([CH:16]=[CH2:17])[CH2:14][S:15][C@H:10]12

参加物

7

反応物 4

HCID 6422Trifluoroacetic acidHCID 10340Sodium CarbonateHCID 516892Sodium BicarbonateHCID 12818010HCID 12818010、化合物

生成物 1

HCID 128180067-Amino-3vinyl-3-cephem-4-carboxylic acid収率 49.4%

試薬・触媒・溶媒 2

HCID 7519Anisole溶媒HCID 8857Ethyl Acetate溶媒

実験手順

To a suspension of benzhydryl 7-benzylideneamino-3-vinyl-3-cephem-4-carboxylate (8.6 g) in anisole (10 ml) was added dropwise trifluoroacetic acid (10 ml) at -20° C., and the reaction temperature was gradually raised to ambient temperature with stirring, followed by stirring at ambient temperature for half an hour. The reaction mixture was poured into a mixture of ethyl acetate (100 ml) and a saturated aqueous sodium bicarbonate (100 ml), and then the mixture was adjusted to pH 7.5 with 20% aqueous sodium carbonate. The separated aqueous solution was washed with ethyl acetate (100 ml) and adjusted to pH 7.2 with conc. hydrochloric acid, followed by subjecting to column chromatography on alumina (10 ml). Elution was carried out with 15% aqueous sodium chloride, and fractions containing a desired compound were collected and then adjusted to pH 3.3 with conc. hydrochloric acid. The precipitated crystals were collected by filtration, washed with acetone and dried to obtain 7-amino-3-vinyl-3-cephem-4-carboxylic acid (2.0 g), mp 200°-230° C. (dec.).

後処理

  1. stirringby stirring at ambient temperature for half an hour
  2. washThe separated aqueous solution was washed with ethyl acetate (100 ml)
  3. washElution
  4. additioncontaining a desired compound
  5. customwere collected
  6. filtrationThe precipitated crystals were collected by filtration
  7. washwashed with acetone
  8. customdried

出典と根拠

ORDレコード
ord-2ad8242cce134885a5f4c5ac16d93e4c
出典データセット
uspto-grants-1988_03
特許番号
US04731443

関連ノート

読み込み中…