OMICS International OMICS International is a scientific organization that drives the progress of research through open access journals and organizes international conferences, The best in science news, commentary, and research. Organic Chemistry: Current Research Volume 6, Issue 1 Synthesis and Investigation of New Different PyrimidineThiones Enantioselective Michael Addition of Diethyl Malonate on SubstitutedChalcone Catalysed by NickelSparteine Complex A Concise Review on Biological Activity of Tridax procumbens Linn Synthesis Characterization and In Vitro Antitumor Evaluation of NewPyrazolo34dPyrimidine Derivatives