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Rh(III) and Ru(II)-Catalyzed Site-Selective C–H Alkynylation of Quinolones
Kang, Dahye,Hong, Sungwoo American Chemical Society 2015 ORGANIC LETTERS Vol.17 No.8
<P>C2- and C5-alkynylated quinolone scaffolds are core structures of numerous biologically active molecules. Utilizing TIPS-EBX as an alkynylating agent, we have developed an efficient and site-selective C5 alkynylation of 4-quinolones that is directed by the weakly coordinating carbonyl group. In addition, Ru(II) catalyzed C2-selective alkynylation was successfully realized via N-pyrimidyl group-directed cross-couplings to access valuable C2-alkynylated 4-quinolones. This strategy provides direct access to the C2 or C5 alkynylated 4-quinolones. Furthermore, the reaction was applied to isoquinolones for C3-selective alkynylation.</P>
Kang, Dahye,Kim, Taehwan,Lee, Hyunpyo,Hong, Sungwoo American Chemical Society 2018 ORGANIC LETTERS Vol.20 No.23
<P>Catalytic ring-opening phosphonation and phosphatation of vinyl aziridines have been developed in a regiodivergent fashion, giving linear and branched products. Generation of P-centered radicals enables S<SUB>N</SUB>2′-type ring-opening reactions of vinyl aziridines to afford δ-amino alkylphosphorus products at room temperature. On the other hand, in situ generated phosphate anions via the Ag-catalyzed aerobic oxidation of phosphonyl reactants underwent S<SUB>N</SUB>2 reaction to provide branched phosphorus-containing amine products. Furthermore, this divergent methodology serves as a powerful tool for the stereospecific synthesis of phosphorus-containing amino acid derivatives.</P> [FIG OMISSION]</BR>
Site-Selective C−H Bond Functionalization of Chromones and Coumarins
Kang, Dahye,Ahn, Kukcheol,Hong, Sungwoo Wiley (John WileySons) 2018 ASIAN JOURNAL OF ORGANIC CHEMISTRY Vol.7 No.7
<P>Chromones and coumarins are privileged scaffolds that are widely distributed in natural products, synthetic building blocks, pharmaceutical agents, and functional materials. Chromones and coumarins have chemically distinct C-H bonds that can be converted into valuable functional groups for the purpose of constructing compounds with diverse pharmacological profiles. Recent advances in the development of methods and an understanding of the innate electronic properties of chromones and coumarins have led to approaches that provide high levels of site-selectivity. This focus review highlights recent innovative strategies for the efficient modification of these structural frameworks through site-selective C-H bond functionalizations.</P>
국내 미이용 바이오매스 기반 식품공정 저탄소화 기술화 방안
강태진(Tae-Jin Kang),김진호(JinHo Kim),이다혜(Dahye Lee),김지현(JiHyun Kim),이예지(YeJi Lee),이수출(Soo Chool Lee),강석환(Suk-Hwan Kang) 한국환경에너지공학회 2022 한국열환경공학회 학술대회지 Vol.2022 No.2
2021년 7 월 EU에서 발표한 탄소국경 제도(CBAM: Carbon Border Adjustment Mechanism)에 의해 국경 간 거래되는 제품의 직 · 간접적 탄소배출량을 기초로 산정하여 무역 관세롤 부과한다. 이에 따라, 2026년부터 EU 시장에 수출하는 모든 기업은 수출 제품의 탄소 비 용을 부담해야 한다. 대표적인 탄소 多배출 산업에 속하는 식품 가공산업의 경우 수출을 주력으로 하기에 저탄소 공정개발 및 구축을 통한 식품업종의 경쟁력 확보가 필요하다. 따라서 본 연구에서는 식품공정 중 에너지 소비량 및 온실가스 배출량이 가장 높은 공정인 건조공정에 국내 미이용 바이오매스를 이용한 저탄소화 방안과 이에 따른 온실가스 감축량 및 기대효과에 대해 고찰하였다.