[3,1]Oxazino[5′,4′:5,6]-,pyrido[3′,2′:5,6]-,pyrimidino[5′,4′:5,6]-,and pyrrolo[3′,2′:5,6]pyrano[3,2-c]chromene derivatives from 9-amino-7-(4-chlorophenyl)-6-oxo-6 H,7 H -pyrano[3,2-c]chromene-8-carbonitrile

Abstract

Pyrido[3′,2′:5,6]-, [3,1]Oxazino[5′,4′:5,6]-, pyrimidino[5′,4′:5,6]-, and pyrrolo[3′,2′:5,6] pyrano[3,2-c]chromene derivatives were obtained via the reaction of 9-amino-7-(4-chlorophenyl)-6-oxo-6H,7H-pyrano[3,2-c]chromene-8-carbonitrile 1 with diethyl malonate, Schiff's base, acetic acid, phenyl isothiocyanate and chloroacetic acid, respectively. Alkylation, acylation and hydrazinolysis of 1 were also discussed. The IR, ¹H NMR, ¹³C NMR and MS spectra of the synthesised compounds were discussed.