Methylphenyl sulfonyl amino -pyridinium inner salt

1 -[[(4-Methylphenyl)sulfonyl]amino] pyridinium inner salt 

Solubility soluble in dichloromethane, acetonitrile, ethanol, and methanol insoluble in ethyl acetate, tetrahydrofuran, toluene, and water. 

5 N NaOH, dried over Na2S04, filtered, and concentrated in vacuo. Purification by column chromatography gave 91% yield on a 1.24 mmol scale. Other methods prepared from pyridine and phenyl(tosylimino)iodinane with copper or ruthenium catalysts were also reported.  

Purification purified by column chromatography (CH2CI2/ MeOH, or CH2Cl2, or CH2Cl2/acetone ). 

Handling, Storage, and Precautions stable at ambient conditions (no decomposition within 2 weeks) use in a fume hood. 

---