Studies on Organo Sulfur Compounds. IV. The Reaction of Sodium sec- and tert-α-Acetylenyl Xanthates with Alkyl Halide

The reaction of sodium sec- and tert-α-acetylenyl xanthate with methyl iodide afforded corresponding α-acetylenyl xanthate in a few cases, and other products such as allenic dithiolcarbonate, thioncarbonate and cyclic compound were isolated in case by case. Nevertheless, in all cases, dimethyl trithiocarbonate (IV) was obtained. A certain correlation between the formations of α-acetylenyl xanthate, allenic dithiolcarbonate, and dimethyl trithiocarbonate (IV) was observed.