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Unusual ring transformations: Reaction of phenyl 7‐fluoro‐4‐chromone‐3‐sulfonate with methyl 3‐oxo‐pentanoate in the presence of ammonium acetate
Author(s) -
Löwe Werner,
Schott Susan
Publication year - 1994
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570310227
Subject(s) - chemistry , chromone , sulfonate , ammonium acetate , ring (chemistry) , ammonium , medicinal chemistry , organic chemistry , sodium , high performance liquid chromatography
The 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.