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Vol. 36 No. 4 (2024): Vol 36 Issue 4, 2024

Copyright (c) 2024 Kilaru Padma Suhasini, Jayanthi Suresh Kumar, Voosala Christopher, Challa Gangu Naidu

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Synthesis, Characterization of New Benzopyran Pyrimidines and Study of their Solvatochromic Behaviour

https://doi.org/10.14233/ajchem.2024.30980
Kilaru Padma Suhasini
Department of Chemistry, Vignan’s Institute of Engineering for Women (A), Visakhapatnam-530049, India
https://orcid.org/0000-0003-1161-3470
Jayanthi Suresh Kumar
Department of Engineering Chemistry, S.R.K.R. Engineering College, Bhimavaram-534204, India
https://orcid.org/0009-0008-8135-2337
Voosala Christopher
Department of Chemistry, Andhra University, Visakhapatnam-530003, India
https://orcid.org/0000-0002-6829-3124
Challa Gangu Naidu
Department of Basic Sciences and Humanities, Vignan’s Institute of Information Technology (A), Visakhapatnam-530049, India
https://orcid.org/0000-0002-8369-7362

Corresponding Author(s) : Kilaru Padma Suhasini

suhasini.kl@gmail.com

Asian Journal of Chemistry, Vol. 36 No. 4 (2024): Vol 36 Issue 4, 2024

Abstract

Five new benzopyran pyrimidines (5a-e) were synthesized in three steps by using silica-sulphuric acid as catalyst. All the synthesized benzopyran pyrimidines with various substituents were characterized by spectroscopic techniques such as 1H NMR, 13C NMR, IR and mass spectroscopy. The structural features of these molecules containing pyrimidine ring with π-conjugated systems and various functional groups on the aromatic rings greatly influence their photophysical properties. Thus, they behave as better candidates for developing the photoelectric materials. Thus, it is proposed to synthesize, characterize and study their solvatochromic behaviour in various polar and non-polar organic solvents viz. dichloromethane, tetrahydrofuran, ethyl acetate, acetonitile and ethanol. Interestingly, all the target molecules exhibited greater Stoke’s shift (λf-λa) in dichloromethane except for compound 5e, which exhibited greater value in tetrahydrofuran, possibly due to the moderately polar nature of the solvent. The synthesized benzopyran pyrimidines displayed solvatochromic characteristics due to the presence of multiple substituted functional groups on the rings in different organic solvents. Due to their remarkable properties, they could serve as potential candidate molecules for future investigations into photoelectric materials.

Keywords

Synthesis Pyrimidines Benzopyran Solvents Absorption Emission
Suhasini, K. P., Kumar, J. S., Christopher, V., & Naidu, C. G. (2024). Synthesis, Characterization of New Benzopyran Pyrimidines and Study of their Solvatochromic Behaviour. Asian Journal of Chemistry, 36(4), 913–918. https://doi.org/10.14233/ajchem.2024.30980
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