Nahid Shajari - Department of Chemistry, Zanjan Branch, Islamic Azad University, P.O. Box ۴۹۱۹۵-۴۶۷, Zanjan, Iran
Reza Ghiasi - Department of Chemistry, Faculty of science, East Tehran branch, Islamic Azad university, Qiam Dasht, Tehran, Iran
Ali Ramazani - Department of Chemistry, University of Zanjan, P.O. Box ۴۵۱۹۵-۳۱۳, Zanjan, Iran

The two-component reaction of ۲-thiouracil and dialkyl acetylenedicarboxylate in solvent-free conditions occurred under thermal conditions and dialkyl ۵-oxo-۵H-[۱,۳]thiazolo[۳,۲-a]pyrimidine-۲,۳-dicarboxylate derivatives produced were formed. The reaction proceeded smoothly and cleanly under mild reaction conditions. The structures of the products were confirmed by IR, ۱H NMR, ۱۳C NMR, and elemental analysis. We also used ethyl phenylacetylenecarboxylate and methyl acetylenecarboxylate in this reaction, but no reaction happened. Stability, dipole moment, and global reactivity parameters of the dimethyl ۵-oxo-۵H-[۱,۳]thiazolo[۳, ۲-a]pyrimidine-۲,۳-dicarboxylate molecule were calculated at the CAM-B۳LYP/۶-۳۱۱G(d,p) level of theory.

Two-component reaction, ۲-Thiouracil, Dialkyl acetylenedicarboxylate, DFT calculation