Polysubstituted alkyl sulfinic acid lactone and preparation method thereof

The invention relates to polysubstituted alkyl sulfinic acid lactone and a preparation method thereof.The preparation method comprises the following steps that a first substrate, a photocatalyst and a first organic solvent are added into a reaction container and mixed to be uniform, then the mixture reacts completely at the room temperature under the irradiation of a blue light source, and a mixed solution after the reaction is obtained; the first substrate is an alkenyl sulfinate derivative; and filtering and desolventizing the reacted mixed solution, and treating through column chromatography or a trace sample distillation instrument to obtain the polysubstituted alkyl sulfinic acid lactone. The polysubstituted sulfinic acid lactone provided by the invention has various compound forms and rich substituent groups, has important application prospects, can be subsequently subjected to in-situ oxidation, reduction, ring opening and other diversified functionalization to synthesize fluorine-containing sultone, m