Synthesis and Photochemical Study of Thiazolidine Derivatives of Cymantrene and the Corresponding Dicarbonyl Chelates

Abstract

Isomeric 4,5-dihydro-2-[(cymantrenylmethyl)thio]thiazole(1) and 3-(cymantrenylmethyl)-1,3-thioazolidine-2-thione (2) were synthesized and photochemical behavior and spectral characteristics of tricarbonyl and dicarbonyl complexes were studied. Irradiation of compounds 1 and 2 results in the formation of stable chelates due to coordination of manganese to the donor nitrogen and sulfur atoms of the thiazolidine substituent. Photolysis is accompanied with a colour change and the corresponding changes in the UV/Vis spectra depending on the solvent used. In the presence of CO, the dicarbonyl chelates enter the dark reaction to give the parent tricarbonyl complexes thus forming intermolecular photochromic systems. Photolysis of the dicarbonyl chelate 5 gives the isomeric chelate 6, which in the course of the dark isomerization transforms into complex 5. Chelates 5 and 6 form an intramolecular photochromic pair.

Synthesis and Characterization of Some New Heterocyclic Derivatives and Studying of their Biological Activity (Anti-Bacteria)

“…12 Imidazolidines are a well-known type of organic compound of excess interest due to their numerous pharmaceutical applications such as, hypotension, anticarcinogenic, or antibacterial. 13 Quinazolines and quinazolinones are kinds of fused heterocycles that are of appreciable interest because of the diverse arear of their biological properties. 14 Activities of quinazoline derivatives, involve, anti-cancer anti-inflammation, analgesia, anti-virus, anti-spam, anti-bacterial, anti-cytotoxin.…”