1,4-Dioxane → (3S,4R)-4-(2-p-nitrobenzyloxycarbonylaminoethylthiothiocarbonylthio)-3-methoxy-2-oxoazetidine

HRID 1710251Notes

Reaction equation

HRID 1710251 reaction equation
[C:1](=[S:20])([S-:19])[S:2][CH2:3][CH2:4][NH:5][C:6]([O:8][CH2:9][C:10]1[CH:15]=[CH:14][C:13]([N+:16]([O-:18])=[O:17])=[CH:12][CH:11]=1)=[O:7].[K+].C(O[C@@H:26]1[NH:29][C:28](=[O:30])[C@H:27]1[O:31][CH3:32])(=O)C.O1CCOCC1>O.P([O-])([O-])([O-])=O>[N+:16]([C:13]1[CH:14]=[CH:15][C:10]([CH2:9][O:8][C:6]([NH:5][CH2:4][CH2:3][S:2][C:1]([S:19][C@H:26]2[NH:29][C:28](=[O:30])[C@@H:27]2[O:31][CH3:32])=[S:20])=[O:7])=[CH:11][CH:12]=1)([O-:18])=[O:17]

Participants

6

Reactant 3

HCID 312751,4-DioxaneHCID 23035703Potassium 2-p-nitrobenzyloxycarbonylaminoethyl trithiocarbonateHCID 56607243(3S,4S)-4-acetoxy-3-methoxy-2-oxoazetidine

Product 1

HCID 56621546(3S,4R)-4-(2-p-nitrobenzyloxycarbonylaminoethylthiothiocarbonylthio)-3-methoxy-2-oxoazetidine

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 1061PhosphateSolvent

Procedure

A solution of 422 mg of potassium 2-p-nitrobenzyloxycarbonylaminoethyl trithiocarbonate in 1 ml of water is added dropwise at room temperature under, a nitrogen atmosphere to a solution of 159 mg (1 mmole) of (3S,4S)-4-acetoxy-3-methoxy-2-oxoazetidine in 3 ml of phosphate buffer of a pH of 7 and 0.2 ml of dioxan, and the mixture is stirred at the same temperature for 30 minutes. The reaction mixture is exhaustively extracted with methylene chloride. The combined organic phases are dried over sodium sulphate and concentrated by evaporation in vacuo. The residue is chromatographed over silica gel and yields the title compound with the following

Workup

  1. extractionThe reaction mixture is exhaustively extracted with methylene chloride
  2. dry with materialThe combined organic phases are dried over sodium sulphate
  3. concentrationconcentrated by evaporation in vacuo
  4. customThe residue is chromatographed over silica gel

Sources & evidence

ORD record
ord-3f1ec394cd984573a978c0518744473d
Source dataset
uspto-grants-1990_08
Patent number
US04952690

Reaction notes

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