Bulletin of the Chemical Society of Japan p. 2323 - 2324 (1984)
Update date:2022-08-03
Topics:
Nakazumi
Ueyama
Sonoda
Kitao
Reaction of 2-phenyl-4H-1-benzothiopyran-4-ones and related compounds with chloromethyl methyl ether and fuming sulfuric acid gave mainly the 3-chloromethyl compound, whereas chloromethylation of methoxy-substituted thioflavones took place at another position or gave the tris(chloromethyl) compound. 3-(Chloromethyl)thioflavone could be easily converted into various 3-(substituted methyl)thioflavones which showed significant antimicrobial activity against Trichophytons.
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