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The design of probes for monitoring various structures and dynamics of DNA and its surroundings is an important step in understanding biological events accompanying interbiomolecular interaction. We have developed novel fluorescent nucleosides in which the uracil base and the fluorophore are tethered by rigid linkers. They show unique absorption and fluorescence emission spectra. Nucleoside 2 is a...
The cyclization of o-hydroxyphenyl ethynyl ketones was examined from theoretical and experimental standpoints in order to develop efficient synthetic methods for the construction of 2-substituted pyranones possessing significant biological activities. Ab initio studies at HF/6-31G * level on the cyclization indicated that both 6-endo-digonal and 5-exo-digonal cyclizations giving benzopyranones...
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