Metal-Free Synthesis of Cyclic and Acyclic Carbonates from CO<sub>2</sub>and Alcohols
作者:Yu Na Lim、Chan Lee、Hye-Young Jang
DOI:10.1002/ejoc.201400031
日期:2014.3
Diverse cyclic and acyclic carbonates such as ethylene carbonate, propylene carbonate, glycerol carbonate, and dimethyl carbonate were synthesized in moderate to good yields by the direct coupling of the corresponding alcohols with carbon dioxide in the absence of metal catalysts and inorganic bases. The direct carbonation mechanism of alcohols in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene
Sustainable Palladium-Catalyzed Tsuji–Trost Reactions Enabled by Aqueous Micellar Catalysis
作者:Nicholas R. Lee、Farbod A. Moghadam、Felipe C. Braga、Daniel J. Lippincott、Bingchun Zhu、Fabrice Gallou、Bruce H. Lipshutz
DOI:10.1021/acs.orglett.0c01329
日期:2020.7.2
reactions, can be run under micellarcatalysis conditions featuring not only chemistry in water but also numerous combinations of reaction partners that require low levels of palladium, typically on the order of 1000 ppm (0.1 mol %). These couplings are further characterized by especially mild conditions, leading to a number of cases not previously reported in an aqueous micellar medium. Inclusion of diverse
申请人:AJOU UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION 아주대학교산학협력단(220040257423) BRN ▼124-82-14602
公开号:KR20150034002A
公开(公告)日:2015-04-02
이온성 액체와 알코올 활성화 시약의 혼합 용액을 제공하는 단계; 상기 혼합 용액에 알코올과 염기성의 이산화탄소 공급원을 도입하는 단계; 및 상기 알코올과 상기 이산화탄소 공급원을 반응시켜 상기 알코올과 상기 이산화탄소 공급원의 결합에 의한 생성물을 얻는 단계를 포함하는 유기 카보네이트의 합성방법이 제공된다.
Direct Coupling of Cs<sub>2</sub>CO<sub>3</sub>and Alcohols for the Synthesis of Dimethyl, Diethyl, and Various Dialkyl Carbonates
作者:Yu Na Lim、Xi Wang、Eun-Jin Park、Hye-Young Jang
DOI:10.5012/bkcs.2014.35.2.622
日期:2014.2.20
polycarbonate and polyurethane synthesis. Therefore, an efficient and high-yield synthesis for DMC has been actively investigated. Reaction conditions typically involve either carbon monoxide (CO) or derivatives (e.g., phosgene), or carbon dioxide (CO2) or derivatives (e.g., inorganic carbonates or organic cyclic carbonates). Due to the toxicity and flammability of CO and phosgene, the more environmentally
safe and mild procedure for the synthesis of organic carbonates from alkyl halides and tetraethylammonium carbonate (TEAC) is described. This method avoids the use of classical toxic and harmful chemicals like phosgene and carbonmonoxide and works under very mild reaction conditions. An electrochemically-generated derivative of carbondioxide (a cheap and abundant carbon source) was used as the main