engleski

Synthesis and Reactions of Some 4-Heteroaryl-3-nitrocoumarins

By the action of 2-aminothiazole, 2-aminopyridines, and 2-aminopyrimidines, respectively, on 4-chloro-3-nitrocoumarine (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 two phase system or 5 % aqueous sodium hydroxide have been studied.

2-aminothiazole; 2-aminopyridines; 2-aminopyrimidines; 4-chloro-3-nitrocoumarine; 4-heteroarylamino-3-nitrocoumarins

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