There is provided a means to produce industrially a highly pure 2-hydroxy-4-oxa-5-thiatricyclo[4.2.1.0
3,7
]nonane 5,5-dioxide derivative in high yield from highly pure and industrially available raw materials.
The production method for a sultone derivative of the present invention comprises a step (A) to obtain a sulfonic acid derivative by hydrolyzing a sulfonyl halide derivative represented by the following chemical formula 1:
or an enantiomer thereof and a step (B) to obtain a corresponding sultone derivative represented by the following chemical formula 2:
or an enantiomer thereof by treating the sulfonic acid derivative with a oxidizing agent.