Ethyl Acetate → HCID 10418585, compound

HRID 1707453Notes

Reaction equation

HRID 1707453 reaction equation
[C:1]1([CH:7]([O:14][C:15]([C:17]2[N:22]3[C:23](=[O:63])[C@@H:24]([NH:25][C:26](=[O:62])/[C:27](/[C:49]4[N:50]=[C:51]([NH:54][C:55]([O:57][C:58]([CH3:61])([CH3:60])[CH3:59])=[O:56])[S:52][CH:53]=4)=[N:28]\[O:29][C:30]([C:43]4[CH:48]=[CH:47][CH:46]=[CH:45][CH:44]=4)([C:37]4[CH:42]=[CH:41][CH:40]=[CH:39][CH:38]=4)[C:31]4[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=4)[C@H:21]3[S:20](=O)[CH2:19][C:18]=2[S:65][CH2:66][S:67][C:68]2[N:69]([CH3:73])[N:70]=[CH:71][N:72]=2)=[O:16])[C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.P(Cl)(Cl)Cl.C(=O)([O-])O.[Na+].C(OCC)(=O)C>CN(C)C=O>[C:1]1([CH:7]([O:14][C:15]([C:17]2[N:22]3[C:23](=[O:63])[C@@H:24]([NH:25][C:26](=[O:62])/[C:27](/[C:49]4[N:50]=[C:51]([NH:54][C:55]([O:57][C:58]([CH3:61])([CH3:60])[CH3:59])=[O:56])[S:52][CH:53]=4)=[N:28]\[O:29][C:30]([C:37]4[CH:42]=[CH:41][CH:40]=[CH:39][CH:38]=4)([C:43]4[CH:48]=[CH:47][CH:46]=[CH:45][CH:44]=4)[C:31]4[CH:32]=[CH:33][CH:34]=[CH:35][CH:36]=4)[C@H:21]3[S:20][CH2:19][C:18]=2[S:65][CH2:66][S:67][C:68]2[N:69]([CH3:73])[N:70]=[CH:71][N:72]=2)=[O:16])[C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1

Participants

6

Reactant 4

HCID 8857Ethyl AcetateHCID 24387Phosphorus trichlorideHCID 516892Sodium BicarbonateHCID 10396319HCID 10396319, compound

Product 1

HCID 10418585HCID 10418585, compoundYield 94.1%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of 7β-[(Z)-2-(2-t-butoxycarbonylaminothiazol-4-yl)-2-trityloxyiminoacetylamino]-3-(2-methyl-1,2,4-triazol-3-ylthiomethylthio)-3-cephem-4-carboxylic acid diphenylmethyl ester 1-oxide (1.73 g: 1.64 mMol.) in dimethylformamide (15 ml) is added at -20° C. phosphorus trichloride (0.41 ml: 4.08 mMol.), and the mixture is stirred at the same temperature for 20 minutes. The reaction mixture is poured into cold two layers of aqueous sodium hydrogen carbonate and ethyl acetate and stirred. The organic layer is taken, washed with water and brine, dried over sodium sulfate, and concentrated. The residue is purified by silica gel chromatography (toluene: ethyl acetate=2:1) to give 7β-[(Z)-2-(2-t-butoxycarbonylaminothiazol-4-yl)-2-trityloxyiminoacetylamino]-3-(2-methyl-1,2,4-triazol-3-ylthiomethylthio)-3-cephem-4-carboxylic acid diphenylmethyl ester (1.60 g) as dark brown foam. Yield: 94%.

Workup

  1. stirringstirred
  2. washwashed with water and brine
  3. dry with materialdried over sodium sulfate
  4. concentrationconcentrated
  5. customThe residue is purified by silica gel chromatography (toluene: ethyl acetate=2:1)

Sources & evidence

ORD record
ord-7b5b7e8c3d234d4ca150183b310f467e
Source dataset
uspto-grants-1994_10
Patent number
US05352792

Reaction notes

Loading…