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

HRID 26111
ノート
印刷プレビュー

反応式

HRID 26111 の反応式
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]
参加物実験手順後処理出典と根拠反応ノート

参加物

6

反応物 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

生成物 1

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

試薬・触媒・溶媒 2

HCID 6344Dichloromethane溶媒
HCID 8028Tetrahydrofuran溶媒

実験手順

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.

後処理

  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

出典と根拠

ORDレコード
ord-62ba0004612d407a92c665cb3fa89982
出典データセット
uspto-grants-1979_04
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US04147864

反応ノート

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