Electronic absorption spectra of 1,4-dihydropyridines I-XII have been interpreted by means of the SCF-PPP method. Possibility of interpretation of the said spectra of 4-substituted derivatives V-XII as superposition of two independent chromophoric systems is discussed.
Nitration of polyalkyated 3,5-dicyano-1,4-dihydropyridines Ia-Id to the first and second degrees has been studied leading to compounds II and III, and conversion of nitromethyl groups of these compounds into nitrile groups with formation of tricyano derivatives IV and tetracyano derivatives V has been followed. Also given is the fragmentation of the synthesized compounds II-V by an electron impact in mass spectrometer and further spectral characteristics.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.