Journal of Chemical Reactivity and Synthesis
Volume:1 Issue: 2, Spring 2011

one-pot synthesis of pyrrole derivatives via reaction between activated carbonyl compounds, primary amines and 1,3-dicarbonyls under solvent-free conditions is described‎.

Iron (III) phosphate catalyzed condensation reaction of aldehydes, 1,3-dicarbonyl compounds and amuniom acetate refluxing ethanol that remains a common theme in current literature.

Displacement reaction of 2,3-dichloroquinoxaline with secondary amines in boiling ethanol afforded it`s mono aminoquinoxaline derivatives. Further reaction of the latter compounds with sodium azide in warm dimethylsulfoxide achieved a group of 4-amino tetrazolo[1,5-a]quinoxaline derivatives. 1HNMR spectra of these compounds are discussed.

Ab initio HF/6-31G* Methode was employed to calculate  the bond length in 2- phosphinanes  when electronegative groups was at C-2 tend axial and equatorial positions. The magnitude of  the anomeric effect depends on the nature of the substituent, the effect of the substituent can be seen by comparing the bond length in 2-chloro and 2-boromo substituented phosphinanes. The effect of anomeric effect have been effected on the bond length in 2- phosphinanes.

A series of N alkyl 2 ketomethylquinoline derivatives were synthesis by reaction of benzoyl chloride derivatives with N methyl quinaldine iodide in the presence of triethyl amine under microwave irradiation. Enaminone form of the product study by spectroscopy method. The result revealed the  N alkyl 2 ketomethylquinoline the fixed enaminone tautomer.

The lifespan of organic coatings is reduced in outdoor applications by attacks of solar radiation, oxygen and atmospheric pollutants. Degradation of coating and recoating introduce pollutants into the environment. For solvent base coatings like alkyd paints volatile organic compounds (VOC) are main source of pollution. Undesirable mechanical, physical and chemical consequences of the resulting degradation can be substantially restricted by properly selected photo stabilizers.Tautomerization in this compounds make them to be consider as UV absorber important and effective class of UV-absorbers. In this study some new derivatives of absorbers were synthesized. Structures of compounds were elucidated by spectroscopic data and these compounds were added to red alkyd paint as UV absorber. After a week exposure to 80 watt UV-lamp, gloss of high gloss alkyd paint (92 %) reduced to 3 %, although that was 7.1 % for polyester paint. In the presence of TINUVIN 315 3206 and synthesized compounds, stability of paints against UV radiation improved significantly.
 Results indicated that fastness of high gloss red alkyd paint was improved sufficiently. This makes coating more stable and reduces the environmental contamination. Consequently, less recoating will lead to decreasing VOC, costs and other environmental pollutants.

In this study, a variety of 3, 4-dihydropyrimidin-2(1H)-ones derivatives were synthesized via three-component Biginelli reaction. The quaternary ammonium- treated clay -catalyzed process proved to be simple, efficient, and environmentally friendly.