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Synthesis and reactions of some 4‐heteroaryl‐3‐nitrocoumarins—
Author(s) -
Govori S.,
Rapic V.,
Led O.,
Čačić M.,
Tabaković I.
Publication year - 1996
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.5570330224
Subject(s) - chemistry , sodium hydroxide , aminopyridines , aqueous solution , sodium , hydroxide , sodium salt , tetrabutylammonium hydroxide , organic chemistry , inorganic chemistry
By the action of 2‐aminothiazole, 2‐aminopyridines, and 2‐aminopyrimidines, respectively, on 4‐chloro‐3‐nitrocoumarin ( 3 ) the corresponding 4‐heteroarylamino‐3‐nitrocoumarins 5–7 have been isolated in very good yields. Reactions of coumarins 6 and 7 with either aqueous tetrabutylammonium bisulfate/sodium hydroxide in a two phase system or 5% aqueous sodium hydroxide have been studied.