Abdel-Bary, Hamed M. published the artcileReactions with coumarin: synthesis and reactions of coumarin sulfonamides, Safety of Coumarin-6-sulfonyl chloride, the publication is Afinidad (1998), 55(473), 67-71, database is CAplus.
Coumarin-6-sulfonyl chloride was animated with different secondary amines to give the sulfonamides. Treatment of these with hydrazine under controlled conditions effected ring-opening of the lactone ring to afford the corresponding o-hydroxycinnamoyl hydrazides which were converted to hydrazones by reaction with various aldehydes. The hydrazones were cyclized using acetic anhydride to yield oxadiazolines. Reaction of the hydrazides with 4-toluoyl chloride afforded the corresponding N-toluoyl derivatives which cyclized with POCl3 to the corresponding 1,3,4-oxadiazole derivatives Thiosemicarbazide derivatives were obtained by treatment of the hydrazides with PhNCS. Cyclization of the thiosemicarbazides using POCl3 afforded the corresponding 1,3,4-thiadiazoles.
Afinidad 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, Safety of Coumarin-6-sulfonyl chloride.
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