Phenothiazine → Ethylene Oxide

Participants

Reaction Steps

One mole of phenothiazine is placed in a one liter, round bottom flask with 300 ml of toluene. The reaction is maintained under a nitrogen blanket. To the mixture of the phenothiazine and toluene is added 0.05 mole of sulfuric acid as a catalyst. The mixture is then heated to reflux temperature and 1.1 moles of phenylthioethanol is added dropwise over a period of approximately 90 minutes. The phenylthiothethanol is obtained from the reaction of thiophenol and ethylene oxide with a basic catalyst. Water is continuously removed as it is formed in the reaction process.

Provenance & Evidence