Mostajeran, Neda published the artcileSolvent-Free Synthesis and Antibacterial Evaluation of Novel Coumarin Sulfonamides, Formula: C9H5ClO4S, the publication is Pharmaceutical Chemistry Journal (2018), 52(1), 1-7, database is CAplus.
A series of new coumarin-6-sulfonamides have been synthesized as potential antibacterial agents. The reaction of coumarin with chlorosulfonic acid was found to yield the corresponding coumarin sulfonyl chloride. In the next step, coumarin sulfonyl chloride, was reacted with various amines in the presence of K2CO3 under solvent-free conditions to produce coumarin sulfonamides I (R = Ph, cyclohexyl, piperazinyl, etc.) in good to excellent yields. All the synthesized compounds have been screened for their in vitro anti-bacterial activities against Escherichia coli and Staphylococcus aureus bacteria.
Pharmaceutical Chemistry Journal published new progress about 10543-42-7. 10543-42-7 belongs to chlorides-buliding-blocks, auxiliary class Other Aromatic Heterocyclic,Chloride,Sulfonyl chlorides,Ester, name is Coumarin-6-sulfonyl chloride, and the molecular formula is C9H5ClO4S, Formula: C9H5ClO4S.
Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics