S. Kagabu et I. Kaku, PREPARATIVE METHOD FOR 4-ARYL-2-THIOLENONES AND 4-ALKYL-2-THIOLENONES, Bioscience, biotechnology, and biochemistry, 57(11), 1993, pp. 1899-1901
The title compounds were prepared simply by treatment of 2-substituted
3-ethoxycarbonyl-2-propenylisothiuronium salts with alkali in a two-p
hase system.