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  • 09월 05일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능
등록일 2017년 09월 03일 13시 37분 30초
접수번호 2484
발표코드 KCS3-2 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간 수 15시 : 20분
발표형식 심포지엄
발표분야 KCS - [IBS Symposium] Developing New Catalytic Organic Reactions and Investigating Their Applications
저자 및 공동저자 Sunwoo Lee
Department of Chemistry, Chonnam National University, Korea
제목 Decarboxylative C-H Activation for the synthesis of homoisoflavonoids & Decarboxylative trichlorination
내용 The development of simple and convenient method for the preparation of aryl alkynoic acids made it easy accessible tool for the introduction of alkynyl group in organic synthesis. In this presentation, we would like to discuss some of our recent research progress towards the decarboxylative coupling reactions of alkynoic acids. This presentation will cover the ruthenium-catalyzed decarboxylative C-H activation for the synthesis of homoisofalvonoids and metal-free decarboxylative trichlorination of alkynoic acid for the synthesis of trichloromethylketones. Homoisoflavonoid and flavone were selectively obtained from the reaction with salicylaldehydes and arylpropiolic acid in the presence of ruthenium catalyst and base. When the reaction was conducted in DMSO, a variety of homoisoflavonoids were exclusively obtained in good yields. While, several flavones were dominantly formed under t-AmOH solvent. 2,2,2-Trichloroacetophenone derivatives were synthesized via decarboxylative trichlorination from arylpropiolic acids and trichloroisocyanuric acid (TCCA). The reaction was conducted in the presence of H2O at room temperature, and afforded the desired products in good yields. The reaction showed good functional group tolerance towards halides, cyano, nitro, ketone, ester and aldehyde groups. In addition, 2,2,2-trichloroacetophenone derivatives were readily transformed into esters, amides, and hydrazides.
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