Hexameric cycles from hydrogen-bonded ureidopyrimidinones

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Abstract

Hydrogen-bonded ureidopyrimidinone I was prepd. in 4 steps starting from potassium Et malonate and 2-ethylhexanoyl chloride. A linear analog of I, having a p-phenylene linker, was also prepd. The slope of the concn.-dependent viscosity of I in CHCl3 is much lower than that of bifunctional ureidopyrimidinones, which form linear polymers. The analog of I is preorganized to form rigid linear polymers, whereas I is preorganized to form a stable hexameric ring in CHCl3.
Original languageEnglish
Pages (from-to)596-597
JournalPolymer Preprints
Volume44
Issue number1
Publication statusPublished - 2003

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