The Schiff bases (L 1-4 ) were prepared according previously reported procedure (Ramadan et al., 2018). The solutions of 4'-Aminoacetophenone or 3'-Aminoacetophenone and different benzaldehydes derivatives were separately prepared in absolute ethanol. The solutions were mixed with molar ratio 1:1 and the obtained mixtures were refluxed for 30 min. at 80 °C. The Schiff bases were precipitated out on cooling to room temperature and then filtered off. The precipitates were recrystallized from hot ethanol and left to dry under vacuum.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.