Dithioacetals and related derivatives of tetrahydrofuran-2-carbaldehyde
Abstract
2,3-Dichlorotetrahydropyran (3) reacted with propane-1,3-dithiol, ethane-1,2-dithiol, and ethanethiol in the presence of titanium(IV) chloride to give the corresponding tetrahydrofuran-2-carbaldehyde dithioacetals [(2a),(2b), and (4a), respectively]; the action of strong base on (2a), its mono-sulphoxide (7), and (9)(the sulphone of an analogous monothioacetal) was examined.