Phosphorus trichloride → HCID 501246, compound
Reaction equation
[CH3:1][C:2]1[CH:7]=[CH:6][C:5]([CH3:8])=[CH:4][C:3]=1[CH:9]([S:11]([C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][N+:15]=1[O-])(=[O:13])=[O:12])[CH3:10].P(Cl)(Cl)Cl>C(Cl)(Cl)Cl>[CH3:1][C:2]1[CH:7]=[CH:6][C:5]([CH3:8])=[CH:4][C:3]=1[CH:9]([S:11]([C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][N:15]=1)(=[O:12])=[O:13])[CH3:10]Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
A mixture of 4.7 g (0.017 mole) of 2-[1-(2,5-Dimethylphenyl)-ethylsulfonyl]-pyridine-N-oxide, 60 ml of chloroform, and 7.5 g (0.055 mole) of PCl3 were placed in a 100 ml round bottom flask equipped with a magnetic stirrer and reflux condenser. The mixture was refluxed for one hour, and then the solvent was removed under reduced pressure using a rotovap. To the residue was added 25 ml of ethanol, followed by a second evaporation. The residue crystallized to give a white solid, which was recrystallized from ethanol. Obtained were 3.0 g of product having a melting point of 95-96° C. The IR, NMR and mass spectra were consistent with the proposed structure.