Intramolecular cyclization of (allylthio)sulfines via their vinylsulfenic acid tautomers.
作者:Germana Mazzanti、René Ruinaard、Leonard A. Van Vliet、Paolo Zani、Bianca F. Bonini、Binne Zwanenburg
DOI:10.1016/s0040-4039(00)60979-6
日期:1992.10
Intramolecular cyclization of enethiolizable (allylthio)sulfines afford 2-alkylidene-1,3-dithiolane-1-oxides in good yields. The formation of these compounds can be explained by an initial tautomerization of the sulfine to vinyl sulfenic acid, followed by an intramolecular addition of the sulfenic acid to the allylic double bond. The structures of the products were elucidated by means of H-1-and C-13-NMR spectroscopy as well as LIS effects, deuteriation experiments and an X-my analysis.