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Phosphorus oxychloride → Benzhydryl 7-[2-(4-aminopyrimidin-2-yl)-2-tert-butoxycarbonylmethoxyiminoacetamido]-3-vinyl-3-cephem-4-carboxylate

HRID 1381450
ノート
印刷プレビュー

反応式

HRID 1381450 の反応式
[NH2:1][C:2]1[CH:7]=[CH:6][N:5]=[C:4]([C:8](=[N:12][O:13][CH2:14][C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[C:9]([OH:11])=O)[N:3]=1.P(Cl)(Cl)(Cl)=O.C[Si](CC(N)=O)(C)C.[NH2:35][CH:36]1[C:61](=[O:62])[N:38]2[C:39]([C:45]([O:47][CH:48]([C:55]3[CH:60]=[CH:59][CH:58]=[CH:57][CH:56]=3)[C:49]3[CH:54]=[CH:53][CH:52]=[CH:51][CH:50]=3)=[O:46])=[C:40]([CH:43]=[CH2:44])[CH2:41][S:42][C@H:37]12>C(OCC)(=O)C.C(Cl)Cl.CN(C)C=O>[NH2:1][C:2]1[CH:7]=[CH:6][N:5]=[C:4]([C:8](=[N:12][O:13][CH2:14][C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[C:9]([NH:35][CH:36]2[C:61](=[O:62])[N:38]3[C:39]([C:45]([O:47][CH:48]([C:49]4[CH:50]=[CH:51][CH:52]=[CH:53][CH:54]=4)[C:55]4[CH:60]=[CH:59][CH:58]=[CH:57][CH:56]=4)=[O:46])=[C:40]([CH:43]=[CH2:44])[CH2:41][S:42][C@H:37]23)=[O:11])[N:3]=1
参加物実験手順後処理出典と根拠反応ノート

参加物

8

反応物 4

HCID 24813Phosphorus oxychloride2 回HCID 357676Acetamide, 2-(trimethylsilyl)-2 回HCID 12818000Benzhydryl 7-amino-3-vinyl-3-cephem-4-carboxylateHCID 541766642-(4-Aminopyrimidin-2-yl)-2-tert-butoxycarbonylmethoxyiminoacetic acid

生成物 1

HCID 131713337Benzhydryl 7-[2-(4-aminopyrimidin-2-yl)-2-tert-butoxycarbonylmethoxyiminoacetamido]-3-vinyl-3-cephem-4-carboxylate
収率 17.7%

試薬・触媒・溶媒 3

HCID 6228Dimethylformamide溶媒HCID 6344Dichloromethane溶媒HCID 8857Ethyl Acetate溶媒2 回

実験手順

To a suspension of 2-(4-aminopyrimidin-2-yl)-2-tert-butoxycarbonylmethoxyiminoacetic acid (syn isomer) (1.3 g) in ethyl acetate (25 ml) was added phosphorus oxychloride (0.5 ml) under ice-cooling with stirring, followed by stirring at 0° to 5° C. for half an hour. After trimethylsilylacetamide (28 mg) was added thereto, the mixture was stirred at the same temperature for half an hour. To the mixture was added phosphorus oxychloride (0.5 ml) at 0° to 5° C., followed by stirring at the same temperature for 15 minutes. Thereto was added N,N-dimethylformamide (0.37 ml) at 0° to 5° C., followed by stirring under ice-cooling for half an hour to prepare the activated acid solution. This solution was added at a time to a solution of benzhydryl 7-amino-3-vinyl-3-cephem-4-carboxylate (1.32 g) and trimethylsilylacetamide (3.5 g) in methylene chloride (30 ml) at -20° C., followed by stirring at -10° C. for 40 minutes. The reaction mixture was poured into ethyl acetate, and the separated organic layer was washed with 5% aqueous sodium bicarbonate and 5% aqueous sodium chloride, followed by drying over magnesium sulfate. After removal of the solvent, the residual oil was subjected to column chromatography on silica gel (100 ml) using a mixed solvent of diisopropyl ether and ethyl acetate as an eluent. The fractions containing a desired compound were collected and then evaporated to obtain benzhydryl 7-[2-(4-aminopyrimidin-2-yl)-2-tert-butoxycarbonylmethoxyiminoacetamido]-3-vinyl-3-cephem-4-carboxylate (syn isomer) (0.4 g), mp 155° to 158° C.

後処理

  1. temperaturecooling
  2. stirringby stirring at 0° to 5° C. for half an hour
  3. stirringthe mixture was stirred at the same temperature for half an hour
  4. stirringby stirring at the same temperature for 15 minutes
  5. stirringby stirring under ice-
  6. temperaturecooling for half an hour
  7. customto prepare the activated acid solution
  8. stirringby stirring at -10° C. for 40 minutes
  9. washthe separated organic layer was washed with 5% aqueous sodium bicarbonate and 5% aqueous sodium chloride
  10. dry with materialby drying over magnesium sulfate
  11. customAfter removal of the solvent
  12. additionThe fractions containing a desired compound
  13. customwere collected
  14. customevaporated

出典と根拠

ORDレコード
ord-3c36a5770ebf47538aa119f0f4706463
出典データセット
uspto-grants-1986_04
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US04585860

反応ノート

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