A new method was developed for the synthesis of 4-chalcogenyl-1 H-isochromen-1-ones
through the 6-endo-dig electrophilic cyclization of 2-alkynylaryl esters and diorganyl …

Many molecules called coumarins with very varied biological activities and widely used in
the food, pharmaceutical, cosmetic, and medical industries. Their structure has a significant …

Dioxobimanes, colloquially known as bimanes, are a well-established family of N-
heterobicyclic compounds that share a characteristic core structure, 1, 5-diazabicyclo [3.3. 0] …

A new rigid core dye comprised ESB-NO 2 of chromophore moieties of acetylide (C≡ C),
Schiff base (C˭ N) and nitro (NO 2) was successfully synthesized to demonstrate tail-free …

Two closely related hybrid species containing both, thiazolyl and coumarin groups, were
synthesized by using two different one-pot procedures from a common precursor. The …

The search for analogs of compounds with proved pharmacological activity frequently starts
by obtaining those that result from simple chemical substitutions, have structural and …