Hydrochloric Acid → HCID 21217019, Verbindung

and (iii) 5-Acetylthiomethyl-5-ethyl-2,2-dimethyl-1,3-dioxane (2.0 g.) was stirred at 20°, in 10% aqueous sodium hydroxide solution (2.0 ml.) in methanol (20 ml.), for 24 hours under nitrogen. The mixture was neutralized with concentrated hydrochloric acid (0.5 ml.). Dowex 50×8-200 ion exchange resin (H+ form) (1.0 g.) was added and the mixture was refluxed with stirring, under nitrogen, for 4 hours. The mixture was filtered and the filtrate was evaporated in vacuo. Toluene was added to the residue and the mixture was evaporated in vacuo. 2,2-Di-(hydroxymethyl)-butanethiol was obtained as a colourless oil and was used without further purification (1.0 g.)