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Ethyl Acetate → 1-Propionyloxyethyl 7-[2-benzhydryloxycarbonylmethoxyimino-2-(4-thiazolyl)acetamido]-3-cephem-4-carboxylate

HRID 462603
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HRID 462603 반응식
[C:1]([O:5][CH:6](Cl)[CH3:7])(=[O:4])[CH2:2][CH3:3].[CH:9]([O:22][C:23]([CH2:25][O:26][N:27]=[C:28]([C:44]1[N:45]=[CH:46][S:47][CH:48]=1)[C:29]([NH:31][CH:32]1[C:42](=[O:43])[N:34]2[C:35]([C:39]([OH:41])=[O:40])=[CH:36][CH2:37][S:38][C@H:33]12)=[O:30])=[O:24])([C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1)[C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1.C(=O)([O-])[O-].[K+].[K+].C(OCC)(=O)C>CS(C)=O>[CH:9]([O:22][C:23]([CH2:25][O:26][N:27]=[C:28]([C:44]1[N:45]=[CH:46][S:47][CH:48]=1)[C:29]([NH:31][CH:32]1[C:42](=[O:43])[N:34]2[C:35]([C:39]([O:41][CH:6]([O:5][C:1](=[O:4])[CH2:2][CH3:3])[CH3:7])=[O:40])=[CH:36][CH2:37][S:38][C@H:33]12)=[O:30])=[O:24])([C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1)[C:16]1[CH:17]=[CH:18][CH:19]=[CH:20][CH:21]=1
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참가 물질

6

반응물 4

HCID 8857Ethyl AcetateHCID 11430Potassium Carbonate2회HCID 135066761-Chloroethyl propionateHCID 1317142057-[2-Benzhydryloxycarbonylmethoxyimino-2-(4-thiazolyl)acetamido]-3-cephem-4-carboxylic acid

생성물 1

HCID 1317142101-Propionyloxyethyl 7-[2-benzhydryloxycarbonylmethoxyimino-2-(4-thiazolyl)acetamido]-3-cephem-4-carboxylate
수율 55.4%

시약·촉매·용매 1

HCID 679Dimethyl Sulfoxide용매

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온도
40 °C

실험 절차

1-Chloroethyl propionate (0.6 g) was added to the mixture of 7-[2-benzhydryloxycarbonylmethoxyimino-2-(4-thiazolyl)acetamido]-3-cephem-4-carboxylic acid (syn isomer) (2.0 g) in dimethyl sulfoxide (13 ml) and potassium carbonate (0.3 g) and the mixture was stirred for 2 hours at 40° C. The reaction mixture was added to the mixture of ice-water and ethyl acetate and the mixture was adjusted to pH 7.5 with 20% aqueous solution of potassium carbonate. The separated organic layer was washed with water, dried over magnesium sulfate and evaporated to give 1-propionyloxyethyl 7-[2-benzhydryloxycarbonylmethoxyimino-2-(4-thiazolyl)acetamido]-3-cephem-4-carboxylate (syn isomer) (1.3 g).

후처리

  1. washThe separated organic layer was washed with water
  2. dry with materialdried over magnesium sulfate
  3. customevaporated

출처 및 근거

ORD 기록
ord-653b1ebed7864fadb601c4c089ea6337
출처 데이터셋
uspto-grants-1985_05
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US04515788

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