Bedair, A. H. published the artcileBiologically active sulfonamides derived from α-pyrones, Formula: C9H5ClO4S, the publication is Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry (1987), 26B(1), 91-4, database is CAplus.
Amidation of 3-carbethoxycoumarin (I) and p-H2NC6H4SO2NHR [e.g., R = H, o-, m-, and p-tolyl, CH2Ph, C(NH2):NH] gave R1CONHC6H4SO2NHR-p (II) (same R; R1 = coumarin-3-yl). Treatment of I with p-H2NNHSO2C6H4NHAc gave R1CONHNHSO2C6H4R2 III (same R1; R2 = NHAc-p), which was converted to III (R2 = N:CHPh-p) with PhCHO after hydrolysis. Substitution reaction of 6-coumarinsulfonyl chloride (= R3SO2Cl) with p– or o-HOC6H4CHO gave R3SO3C6H4CHO-p (IV) or –o, resp. IV was converted to Schiff bases V (R4 = o-NO2, p-Me) with R4C6H4NH2 (same R4). Similar reactions occurred starting with 3-carbethoxy-5,6-benzocoumarin. II (R = H, o-tolyl), IV, and V showed bactericidal activity.
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry 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,
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