Neurotropic and Psychotropic Substances. XLVI. 2825 an aqueous-ethanolic solution of potassium hydroxide. During subsequent acidification thiophenol appeared so that, in addition to hydrolysis and decarboxylation, the cyc! ohexyl-S bond is also cleaved. The acid was obtained in only a 19% yieldaccording to its NMR spectrum it is 2-(phenylthio) cyclohexene-l~ acetic acid (IX). The attempt at cyclization of acid IX with polyphosphoric ...