Computational Sciences - Research Publications
Permanent URI for this collectionhttps://kr.cup.edu.in/handle/32116/42
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Item Synthesis and photophysics of new unsymmetrically substituted 5,5?-diaryl-2,2?-bypiridine-based “push-pull” fluorophores(Elsevier Ltd, 2019) Starnovskaya E.S.; Kopchuk D.S.; Khasanov A.F.; Tanya O.S.; Santra S.; Giri K.; Rahman M.; Kovalev I.S.; Zyryanov G.V.; Majee A.; Charushin V.N.New unsymmetrically substituted 5,5?-diaryl-2,2?-bypiridine “push-pull “ fluorophores were prepared in good yields via the “1,2,4-triazine method “/Suzuki coupling reaction sequence. The obtained fluorophores contain the “push-pull “ system with donor and acceptor moieties arranged in a D-?-A-?-D fashion, and that provides both the prospective photophysical properties and unique solvatocromic effects for the most representative compounds.Item Solvent-free synthesis of 5-(aryl/alkyl)amino-1,2,4-triazines and ?-arylamino-2,2?-bipyridines with greener prospects(Royal Society of Chemistry, 2017) Kopchuk D.S.; Chepchugov N.V.; Kovalev I.S.; Santra S.; Rahman M.; Giri K.; Zyryanov G.V.; Majee A.; Charushin V.N.; Chupakhin O.N.A green and highly efficient method has been developed for the synthesis of 5-(aryl/alkyl)amino-1,2,4-triazines and ?-arylamino-2,2?-bipyridines according to the principles of atom economy. It has been performed by two consecutive solvent-free reaction pathways: the ipso-substitution of a cyano-group in 5-cyano-1,2,4-triazines and the aza-Diels-Alder reaction of the resulting 5-arylamino-1,2,4-triazines with 1-morpholinocyclopentene used as a dienophile. Solvent and catalyst-free conditions, operational simplicity, the compatibility with various functional groups, nonchromatographic purification technique, and high yields are the notable advantages of this procedure. The present methodology possesses a low E-factor.