Takahashi, Kensuke et al. published their research in Bulletin of the Chemical Society of Japan in 1961 | CAS: 69815-97-0

4-Methylthiophene-2-sulfonyl chloride (cas: 69815-97-0) belongs to benzothiophene derivatives. Benzothiophene is relatively a stable molecule. The core structure is a part of various pharmaceutical substances and natural products. It has been used as a raw material for the synthesis of biologically active structures and is found in pharmaceuticals such as leukotriene synthesis inhibitors and antifungals, as well as in many natural products.Computed Properties of C5H5ClO2S2

The proton magnetic resonance spectra of methylthiophenesulfonyl chlorides was written by Takahashi, Kensuke;Matsuki, Yasuo;Miyake, Yoshiteru;Hazato, Genjiro. And the article was included in Bulletin of the Chemical Society of Japan in 1961.Computed Properties of C5H5ClO2S2 This article mentions the following:

The nuclear magnetic resonance spectra of the 6 isomers of methylthiophenesulfonyl chloride are reported. Values are given for J25, J24, and for some exptl. coupling constants for the Me group and the ring proton. Solvent effects on the chem. shifts are reported. In the experiment, the researchers used many compounds, for example, 4-Methylthiophene-2-sulfonyl chloride (cas: 69815-97-0Computed Properties of C5H5ClO2S2).

4-Methylthiophene-2-sulfonyl chloride (cas: 69815-97-0) belongs to benzothiophene derivatives. Benzothiophene is relatively a stable molecule. The core structure is a part of various pharmaceutical substances and natural products. It has been used as a raw material for the synthesis of biologically active structures and is found in pharmaceuticals such as leukotriene synthesis inhibitors and antifungals, as well as in many natural products.Computed Properties of C5H5ClO2S2

Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem