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

HRID 1381450
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HRID 1381450 반응식
[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
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참가 물질

8

반응물 4

HCID 24813Phosphorus oxychloride2회HCID 357676Acetamide, 2-(trimethylsilyl)-2회HCID 12818000Benzhydryl 7-amino-3-vinyl-3-cephem-4-carboxylateHCID 541766642-(4-Aminopyrimidin-2-yl)-2-tert-butoxycarbonylmethoxyiminoacetic acid

생성물 1

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

시약·촉매·용매 3

HCID 6228Dimethylformamide용매HCID 6344Dichloromethane용매HCID 8857Ethyl Acetate용매2회

실험 절차

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.

후처리

  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

출처 및 근거

ORD 기록
ord-3c36a5770ebf47538aa119f0f4706463
출처 데이터셋
uspto-grants-1986_04
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US04585860

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