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Furfurylidene acetophenone 유도체에 대한 Thiourea 의 친핵성 첨가반응 메카니즘과 그 반응속도론적 연구
이기창,목갑영,오세영,류정욱 ( Ki Chang lee,Gab Young Mok,Se Young Oh,Jung Wok Ryu ) 한국유화학회 1997 한국응용과학기술학회지 Vol.14 No.1
Furfurylidene acetophenone derivatives were synthesis, it was measured that nucleophilic addition made use of UV at a wide pH 1.0∼13.0 range in 30% dioxane-H_2O solution, 25℃. On the basis of general base catalysis, substitutent effect, confirmation of nucleophilic addition products, it was measured the reaction rate of furfurylidene acetophenone derivatives for the pH change. It may be concluded that a part was unrelated to pH and another part was in proportion to concentration of hydroxide ion : Above pH 10.0 sulfide anion adds to the double bond(Michael type addition), a part having no concern with pH, addition reaction to double bond is initiated by addition of neutral thiourea molecule. From the result of measurement the reaction rate, nucleophilic addition of furfurylidene acetophenone derivatives confirmed to the irreversible first order, Through measurement the substituent effect, It found that reaction rate was accelerated by electron attracting group. On the basis of these findings, nucleophilic addition of thiourea for the furfurylidene acetophenone derivative was proposed a fitting mechanisms.