Biomass into chemicals: One-pot two- and three-step synthesis of quinoxalines from biomass-derived glycols and 1,2-dinitrobenzene derivatives using supported gold nanoparticles as catalysts
one-pot two-step method, for the synthesis of quinoxalines by oxidative coupling of vicinal diols with 1,2-phenylenediamine derivatives, has been developed by using gold nanoparticles supported on nanoparticulated ceria (Au/CeO2) or hydrotalcite (Au/HT) as catalysts and air as oxidant, in the absence of any homogeneous base. Reaction kinetics shows that the reaction controlling step is the oxidation of
通过使用负载在纳米二氧化铈(Au / CeO 2)或水滑石上的金纳米粒子,开发了一种有效的,选择性的一锅两步方法,该方法通过邻二醇与1,2-苯二胺衍生物的氧化偶联来合成喹喔啉。(Au / HT)作为催化剂,空气作为氧化剂,没有任何均相碱。反应动力学表明,反应控制步骤是将二醇氧化为α-羟基羰基化合物。此外,已经成功地进行了以1,2-二硝基苯和1,2-丙二醇为原料的2-甲基喹喔啉的一锅式三步合成,最终产物的转化率为98%,总产率为83%。
[EN] PHOSPHOGLYCERATE KINASE INHIBITORS<br/>[FR] INHIBITEURS DE LA PHOSPHOGLYCÉRATE KINASE
申请人:ABBOTT LAB
公开号:WO2012045196A1
公开(公告)日:2012-04-12
Disclosed are compounds of formula (I) or pharmaceutical acceptable salts thereof, wherein R1, R2, R3 and R4 are as defined in the description. Disclosed are also the methods of making said compounds, and compositions containing said compounds which are useful for inhibiting kinases such as phosphoglycerate kinase.
Copper(II)-Mediated [<sup>11</sup>C]Cyanation of Arylboronic Acids and Arylstannanes
作者:Katarina J. Makaravage、Xia Shao、Allen F. Brooks、Lingyun Yang、Melanie S. Sanford、Peter J. H. Scott
DOI:10.1021/acs.orglett.8b00242
日期:2018.3.16
A copper-mediated method for the transformation of diverse arylboron compounds and arylstannanes to aryl-[11C]-nitriles is reported. This method is operationally simple, uses commercially available reagents, and is compatible with a wide variety of substituted aryl- and heteroaryl substrates. This method is applied to the automated synthesis of high specific activity [11C]perampanel in 10% nondecay-corrected
General and Mild Nickel-Catalyzed Cyanation of Aryl/Heteroaryl Chlorides with Zn(CN)<sub>2</sub>: Key Roles of DMAP
作者:Xingjie Zhang、Aiyou Xia、Haoyi Chen、Yuanhong Liu
DOI:10.1021/acs.orglett.7b00732
日期:2017.4.21
A new and general nickel-catalyzed cyanation of hetero(aryl) chlorides using less toxic Zn(CN)2 as the cyanidesource has been developed. The reaction relies on the use of inexpensive NiCl2·6H2O/dppf/Zn as the catalytic system and DMAP as the additive, allowing the cyanation to occur under mild reaction conditions (50–80 °C) with wide functional group tolerance. DMAP was found to be crucial for successful
已经开发了一种新的且一般的镍催化的杂(芳基)氯化物氰化方法,该方法使用毒性较小的Zn(CN)2作为氰化物源。该反应依赖于使用廉价的NiCl 2 ·6H 2 O / dppf / Zn作为催化体系,并使用DMAP作为添加剂,从而使氰化反应在温和的反应条件下(50–80°C)发生,且具有宽泛的官能团耐受性。发现DMAP对于成功转化至关重要,并且基于机理研究,该反应可能通过Ni(0)/ Ni(II)催化进行。该方法也成功地扩展到了芳基溴化物和芳基碘化物。