Sulfur analogs of psychotomimetic agents. 2. Analogs of (2,5-dimethoxy-4-methylphenyl)- and of (2,5-dimethoxy-4-ethylphenyl)isopropylamine

The two thio analogues of each of the well-known psychotomimetic drugs DOM [(2,5-dimethoxy-4-methylphenyl)isopropylamine] and DOET [(2,5-dimethoxy-4-ethylphenyl)isopropylamine] have been synthesized and pharmacologically evaluated in man. The 5-thio isomers are more potent as psychotomimetic agents than the 2-thio isomers but still represent a drop of an order of magnitude in potency from the sulfur-free counterparts. The dithio analogue of DOM was synthesized and found to be without central activity at a dosage of approximately 50 times the mean effective dose of DOM.