ロジウムポルフィリンを用いる多点分子認識
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概要
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Rh (III) porphyrins having 2-hydroxynaphthyl or 8-quinolyl groups at the 5-and 15-meso positions exhibit novel bifunctional cooperation of the central Rh (III) ion and the naphthol hydroxyl or quinolyl nitrogen. Thus, ketones undergo a facile enolization as a result of acidbase type cooperation. Amides, on the other hand, undergo a facile acyl substitution in the presence of Ag<SUP>+</SUP> ions, as effected by a double Lewis-acid catalysis. The bis (hydroxynaphthyl) system also fixes amino acids and esters <I>via</I> simultaneous two-point interacion involving the Rh (III) -NH<SUB>2</SUB>-coordination and OH-CO<SUB>2</SUB>R hydrogen bonding (R=H or CH<SUB>3</SUB>). Some other examples of related multi-point molecular recognition using modified porphyrin systems are also presented.
- 社団法人 日本油化学会の論文