Microwave Enhanced Acetylation of Alcohols

Microwave irradiation of alcohols with acetic anhydride in the presence of a catalytic amount of NaOH for a few minutes yielded the corresponding acetylated products in excellent yield.

Chemical constituents from the mangrove plant, Aegiceras corniculatum

From the stems and twigs of the mangrove plant, Aegiceras corniculatum, seven new compounds, namely, 2-methoxy-3-nonylresorcinol (1), 5-O-ethylembelin (2), 2-O-acetyl-5-O-methylembelin (3), 3,7-dihydroxy-2,5-diundecylnaphthoquinone (4), 2,7-dihydroxy-8-methoxy-3,6-diundecyldibenzofuran-1,4-dione (5), 2,8-dihydroxy-7-methoxy-3,9-diundecyldibenzofuran-1,4-dione (6), and 10-hydroxy-4-O-methyl-2,11-diundecylgomphilactone (7), were isolated together with three known compounds, 5-O-methylembelin (8), 3-undecylresorcinol, and 2-dehydroxy-5-O-methylembelin. The structures of 1-7 were determined by spectroscopic methods. Compound 2 and 5-O-methylembelin showed in vitro cytotoxicity against the HL-60, Bel(7402), U937, and Hela cell lines.

Effect of active synthetic 2-substituted quinazolinones on anti-platelet aggregation and the inhibition of superoxide anion generation by neutrophils

Quinazolinones, 2-substituted and 3-substituted, mainly synthesized by microwave irradiation, were subjected to anti-platelet aggregation and inhibition of superoxide anion generation assays. Interestingly, 2-phenyl-4-quinazolinone (4) exhibited significant inhibitory activities toward platelet aggregation and neutrophil activation, and it might therefore serve as a prototype lead compound.