DYES AND PIGMENTS, cilt.71, sa.3, ss.161-167, 2006 (SCI-Expanded)
7,8-Dihydroxy-3-(3,4-dimethoxyphenyl)-2H-chromenoiies, 7,8-diliydroxy-3-(3,5-dimethoxyphenyl)-2H-chromenones and 7,8-dihydroxy-3-(3,4,5-trimethoxypheiiyl)-2H-chromenones, o-diliydroxy-3-iiiethoxyphenyicoumarins, were prepared from 2,3,4-trihydroxybenzaldehyde and corresponding methoxyphenylacetic acid in NaOAc/Ac2O, respectively. 3-Methoxyphenyl-7,8-dihydroxy-2H-chromenone reacted with the polyethylene glycol ditosylate or dichloride in CH3CN/alkali carbonate to afford [12]crown-4, [15]crown-5 and [18]crown-6-chromonones.