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  • 08월 28일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

Task-specific ionic liquids for nucleophilic substitution reactions

2008년 8월 25일 15시 03분 14초
금17A6심 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 16시 : 10분
유기화학 - Diversity in Organic Chemistry (Ionic Liquid in Orgainc Chemistry)
저자 및
지대윤, 이병세, Shinde Sandip S1
인하대학교 화학과, Korea
1인하대학교 화학과, India
Synthesis of task-specific ionic liquids with special functions according to the requirement of a specific reaction has become an attractive field. The protic functionality of tert-alcohol plays crucial role in nucleophilic displacement reaction to decrease the byproduct alkene significantly. On the basis of successful results of ionic liquid and tert-alcohol, we found synergistic effect of two solvents tert-alcohol and ionic liquid, in one molecule in nucleophilic fluorination. The combined molecule, [mim-tOH][OMs] of tert-alcohol and imidazolium salt not only enhances the reactivity of the metal fluorides but also increases the selectivity of the product, consequently decreasing the formation of byproducts such as alkene, ether, and etc. The polymer-supported ionic liquids (PSILs) catalysts enhance the reactivities of nucleophiles and increase the reaction rates comparatively in unbounded ionic liquids as well as crown ethers. Due to the separation problem, ionic resins which quarternary onium salts are supported on a polymer matrix have been developed. Functionalized ionic liquid [mim-tOH][OMs], simple imidazolium ionic liquid, and simple tetraalkyl ammonium salt are known as good PTCs in nucleophilic displacement reaction. Investigation of the comprehensive study on the catalytic activity of newly designed protic-functionalized ionic liquid, ionic liquid, and triethylamine on the polystyrene in various nucleophilic substitution reaction will be discussed.