The invention provides compounds of formula I ##STR1## in which X, R.sup.1, R.sup.2 and R.sup.3 are as defined in the description. The compounds have valuable fungicidal activity.
The invention provides compounds of formula I
in which X, R¹, R² and R³ are as defined in the description. The compounds have valuable fungicidal activity
Synthesis of a range of vinyl aziridines with varying substitution on the alkene has been achieved by the reaction of N-(di-methylsulfamoyl)phenylimine with a range ylides derived by deprotonation of substituted allyltetrahydrothiphenium salts. Yields of the substituted vinyl aziridines range from 57% to 77%.