Lipase catalyzed esterification in ionic liquids was

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Unformatted text preview: PYRIMIDINE, 2-(2METHOXYPHENOXY)PYRAZINE, 2-(4-METHOXYPHENOXY)PYRIMIDINE AND 2-(4METHOXYPHENOXY)PYRAZINE Shah Bakhtiar Nasir, Zanariah Abdullah and Azizah Mainal Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia E-mail: shah_bakhtiar85@yahoo.com 2-(2-methoxyphenoxy)pyrimidine, 2-(2-methoxyphenoxy)pyrazine, 2-(4-methoxyphenoxy)pyrimidine and 2-(4-methoxyphenoxy)pyrazine were synthesized using 2-chloropyrazine and 2-chloropyrimidine 1 with various of phenolic derivatives. The structures of the derivatives were confirmed using H-NMR, 13 C-NMR, IR and GCMS. The crystal structures of the compounds were confirmed with XRD (Bruker SMART APEX diffractometer). Fluorescence studies in various solvents were carried out and 2 -(4methoxyphenoxy)pyrimidine showed the highest fluorescence intensity in chloroform and 2 -(4methoxyphenoxy)pyrazine showed the lowest fluorescence intensity in ethanol. The symmetrical effect of the structure increased the intensity. ORG-O21 PREPARATION OF QUINOLINE DERIVATIVES AS POTENTIAL FLUORESCENTS Zainal Abidin Hasan, Zanariah Abdullah and Hairul Anuar Tajuddin Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia E-mail: zainal_bintang85@yahoo.com Various quinoline derivatives have been synthesized using 2 -chloroquinoline reacted with primary and secondary amine series containing electron donating and withdrawing groups. The structures of all the compounds were confirmed by using spectroscopic methods. The fluorescence characteristics were studied in different organic solvent with same concentration followed by studied in different times. Fluorescence studies show the highest intensity in ethyl acetate, followed by chloroform and ethanol for all compound. Fluorescence peak was also reduced with time due to oxygen quenching effect. 195 23rd-25th June 2010 3rd ICYC 2010 Universiti Sains Malaysia ORG-O22 SYNTHESIS AND CHARACTERIZATION OF A CHROMOGENIC RECEPTOR DERIVED FROM ACETONAPHTHOQUINONE AND 2,4-DINITROPHENYLHYDRAZ...
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