Triphenylphosphine → 2-[(3S,4R)-4-acetylthio-3-methoxy-2-oxoazetidin-1-yl]-2-triphenylphosphoranylideneacetic acid p-nitrobenzyl ester

HRID 2309090Notes

Reaction equation

HRID 2309090 reaction equation
[C:1]1([P:7]([C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)[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.[N+:20]([C:23]1[CH:45]=[CH:44][C:26]([CH2:27][O:28][C:29](=[O:43])[CH:30]([N:32]2[C@H:35]([S:36][C:37](=[O:39])[CH3:38])[C@@H:34]([O:40][CH3:41])[C:33]2=[O:42])Cl)=[CH:25][CH:24]=1)([O-:22])=[O:21]>O1CCCC1.C(Cl)Cl>[N+:20]([C:23]1[CH:45]=[CH:44][C:26]([CH2:27][O:28][C:29](=[O:43])[C:30]([N:32]2[C@H:35]([S:36][C:37](=[O:39])[CH3:38])[C@@H:34]([O:40][CH3:41])[C:33]2=[O:42])=[P:7]([C:1]2[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=2)([C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)[C:14]2[CH:15]=[CH:16][CH:17]=[CH:18][CH:19]=2)=[CH:25][CH:24]=1)([O-:22])=[O:21]

Participants

5

Reactant 2

HCID 11776TriphenylphosphineHCID 566132492-[(3S,4R)-4-acetylthio-3-methoxy-2-oxoazetidin-1-yl]-2-chloroacetic acid p-nitrobenzyl ester

Product 1

HCID 566252452-[(3S,4R)-4-acetylthio-3-methoxy-2-oxoazetidin-1-yl]-2-triphenylphosphoranylideneacetic acid p-nitrobenzyl ester

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 8028TetrahydrofuranSolvent

Procedure

0.84 g of triphenylphosphine is added to a solution of 0.63 g of 2-[(3S,4R)-4-acetylthio-3-methoxy-2-oxoazetidin-1-yl]-2-chloroacetic acid p-nitrobenzyl ester in 1.8 ml of dry tetrahydrofuran, and the mixture is stirred overnight at room temperature under nitrogen. The mixture is diluted with methylene chloride and washed with a cold, saturated, aqueous sodium bicarbonate solution. Additional washing with water, drying over sodium sulphate and concentrating by evaporation in vacuo yield the crude title compound which is purified by chromatography over silica gel with toluene/ethyl acetate (19:1 to 3:1).

Workup

  1. washwashed with a cold, saturated, aqueous sodium bicarbonate solution
  2. washAdditional washing with water
  3. dry with materialdrying over sodium sulphate
  4. concentrationconcentrating by evaporation in vacuo

Sources & evidence

ORD record
ord-675c263f952a46668f5762e7b39883ef
Source dataset
uspto-grants-1987_09
Patent number
US04692442

Reaction notes

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