We have performed a theoretical investigation of the S $$^+$$ ( $$^4$$ S) + SiH $$_{2}$$ $$^1$$ A $$_1$$ ) reaction, possible formation route HSiS and SiSH cations that are alleged to be precursors interstellar silicon sulfide, SiS. Electronic structure calculations allowed us characterize relevant features potential energy surface system identify reaction pathways. The has two exothermic chann...

3,4-dihydropyrimidinones and their derivatives are synthesized via biginelli routes involving an aromatic aldehydes, ethylacetoacetates and urea in one-pot procedure by using cds nanoparticles as efficient heterogeneous catalyst in solvent-free conditions. compared with classical biginelli reaction reported in 1893, this new method provides much improved modification in terms of simplicity. the...