Background. In our daily practice, we often use two standard approaches to methyl sulfones described above (Figure ). Recently, we received a request from a pharmaceutical company for a synthesis of pyrazole 2 (Scheme 1), which was described in a patent before. In that method, bromide 3 was treated first with nBuLi followed by the addition of (MeS)2. "Due to its smell, the crude product (4) was used in the next oxidation reaction without further purification." Oxidation of the latter with mCPBA gave 51 mg of the needed product 2 in 26% yield after a column chromatographic separation. It became obvious to us, that a principally novel approach to pyrazole 2 was needed. We decided to challenge the preparation of a new reagent with the already installed MeSO2-substituent that could be easily converted into the needed product.