Many new cyclized pyran systems with a potential anti-cancer activity were designed and prepared. Pyran showed high reactivity to various chemical reagents. 24 products of the prepared compounds chosen tested in (mM) as respectable anticancer factors. The findings revealed that 3b, 6b, 8 widely effective against three cancer cell lines including A-549 (lung carcinoma), HC-29 (colorectal adenoca...

Columnar liquid crystalline bis-N-annulated quaterrylenes have been prepared from readily available N-annulated perylenes by DDQ/Sc(OTf)(3) oxidative coupling and ring-fusion.

In the title compound, C(26)H(12)FNO(6), the central pyran ring and both benzopyran systems are nonplanar, having total puckering amplitudes of 0.139 (2), 0.050 (1) and 0.112 (2) Å, respectively. The central pyran ring adopts a boat conformation. The crystal structure is stabilized by C-H⋯O, N-H⋯O, N-H⋯F and C-H⋯π inter-actions.

Present study has been carried on synthesis and biological importance of hetrocyclic compounds containing thiozole have attracted world wide attention of a large number of chemists, pharmacologist & biologists on accounts of their significant therophetic and biological properties associated with them. Result of the study shown that they are used as antitubercular, amoebicidal agents, fungicides...

This study is the first detailed ecotoxicological study of the annulated sea snake, Hydrophis cyanocinctus. Concentrations of lead, cadmium, nickel and vanadium were evaluated in muscle, liver, kidney, skin and blood of the annulated sea snake (H. cyanocinctus) and in the whole bodies of its main prey species (Periophthalmus waltoni and Boleophthalmus dussumieri) in the Hara Protected Area, the...

A highly stereoselective one-pot procedure for the synthesis of five-membered annulated hydroxycoumarins has been developed. By merging primary amine catalysis with silver catalysis, a series of functionalized coumarin derivatives were obtained in good yields (up to 91%) and good to excellent enantioselectivities (up to 99% ee) via a Michael addition/hydroalkoxylation reaction. Depending on the...

The natural product saudin was found to induce hypoglycemia in mice and, therefore, could be an appealing lead structure for the development of new agents to treat diabetes. A diastereoselective tandem Stille-oxa-electrocyclization reaction has been developed which provides access to the core structure of saudin in a rapid and convergent manner. This new reaction has been extended to the conver...