Four membered ring adducts from 2π+2π cycloaddition of ketenimines to sulphur dioxide. Isolation of 1,2-thiazetidin-3-one 1-oxides
Abstract
The 1 : 1 adducts obtained from the reaction of dimethylketenimines with liquid sulphur dioxide have been identified, by spectral data and X-ray crystallography, as 1,2-thiazetidin-3-one 1-oxides.