1,5-Diazabicyclo(5,4,0)undec-5-ene → 7beta-Phenoxyacetamido-3-methoxy-ceph-2-em-4alpha-carboxylic acid methyl ester

HRID 26111

반응식

HRID 26111 반응식
N12CCCCC1C=NCCC2.[CH3:12][O:13][C:14](=[O:47])/[C:15](/[N:20]1[CH:23]([S:24]S(C2C=CC(C)=CC=2)(=O)=O)[CH:22]([NH:35][C:36](=[O:45])[CH2:37][O:38][C:39]2[CH:44]=[CH:43][CH:42]=[CH:41][CH:40]=2)[C:21]1=[O:46])=[C:16](/[O:18][CH3:19])\[CH3:17].COC(=O)/C(/N1C(SS(C2C=CC(C)=CC=2)(=O)=O)C(NC(=O)COC2C=CC=CC=2)C1=O)=C(\OC)/C>O1CCCC1.C(Cl)Cl>[CH3:12][O:13][C:14]([C@@H:15]1[N:20]2[C:21](=[O:46])[C@@H:22]([NH:35][C:36](=[O:45])[CH2:37][O:38][C:39]3[CH:40]=[CH:41][CH:42]=[CH:43][CH:44]=3)[C@H:23]2[S:24][CH:17]=[C:16]1[O:18][CH3:19])=[O:47]

참가 물질

6

반응물 3

HCID 3141121,5-Diazabicyclo(5,4,0)undec-5-eneHCID 705570612-[4-(p-Toluenesulphonylthio)-3-phenoxyacetamido-2-oxoazetidin-1-yl)-3-methoxy-crotonic acid methyl esterHCID 705585572-[4-(p-Toluenesulphonylthio)-3-phenoxyacetamido-2-oxoazetidin-1-yl)-3-methoxy-isocrotonic acid methyl ester

생성물 1

HCID 705574947beta-Phenoxyacetamido-3-methoxy-ceph-2-em-4alpha-carboxylic acid methyl ester

시약·촉매·용매 2

HCID 6344Dichloromethane용매HCID 8028Tetrahydrofuran용매

실험 절차

302 mg (2 mmols) of 1,5-diazabicyclo[5.4.0]undec-5-ene are added to a solution of 534 mg (1 mmol) of a mixture consisting of 2-[4-(p-toluenesulphonylthio)-3-phenoxyacetamido-2-oxoazetidin-1-yl)-3-methoxy-isocrotonic acid methyl ester and 2-[4-(p-toluenesulphonylthio)-3-phenoxyacetamido-2-oxoazetidin-1-yl)-3-methoxy-crotonic acid methyl ester in the ratio of about 4:1, in 20 ml of tetrahydrofurane, whilst stirring. The mixture is then stirred for 40 minutes, diluted with 70 ml of methylene chloride and washed successively with dilute hydrochloric acid, with water, with dilute aqueous sodium bicarbonate solution and again with water. The organic phase is dried over sodium sulphate and concentrated by evaporation in vacuo. The residue is chromatographed on 15 g of acid-washed silica gel using toluene/ethyl acetate, 2:1 followed by 1:1, resulting in the elution of, first, pure 7β-phenoxyacetamido-3-methoxy-ceph-2-em-4α-carboxylic acid methyl ester, IR spectrum (in methylene chloride): characteristic bands at 5.60, 5.70, 5.90 and 8.25 μ, followed by pure 7β-phenoxyacetamido-3-methoxy-ceph-3-em-4-carboxylic acid methyl ester, IR spectrum (in methylene chloride): characteristic bands at 5.60, 5.85, 5.90 and 7.10 μ, in the form of colourless foams.

후처리

  1. stirringThe mixture is then stirred for 40 minutes
  2. washwashed successively with dilute hydrochloric acid, with water, with dilute aqueous sodium bicarbonate solution and again with water
  3. dry with materialThe organic phase is dried over sodium sulphate
  4. concentrationconcentrated by evaporation in vacuo
  5. customThe residue is chromatographed on 15 g of acid-washed silica gel

출처 및 근거

ORD 기록
ord-62ba0004612d407a92c665cb3fa89982
출처 데이터셋
uspto-grants-1979_04
특허 번호
US04147864

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