Abstract
AbstractThe novel benzoxathiinopyridines 4 and 5, the hitherto unknown dibenzopyrone 6 and the heterocyclic enaminone 7 have been synthesized by ring transformations of phenyl 7‐fluoro‐4‐chromone‐3‐sulfonate (1) with methyl 3‐oxopentanoate (2) in the presence of ammonium acetate (3). The structures of 4–7 were determinated by spectroscopic methods and the reaction pathways of formation for these compounds are discussed.
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