Synthese von α-Trihalogenmethyl-γ-oxosulfonen

Synthesis of β-Trihalogenomethyl-γ-oxosulfones The title-compounds 6 are formed by reaction of sulfinic acids 4 with 1,1,1-trihalogen-2-buten-4-ones 1 and 1,1,1-trihalogen-2-chloro-4-butanones 8 , respectively, or by addition of thioles 3 to 1 and subsequent oxidation.