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%。
Quinolinone derivatives
申请人:Chiron Coporation
公开号:US20030028018A1
公开(公告)日:2003-02-06
Organic compounds having the formulas I and II are provided where the variables have the values described herein.
1
Pharmaceutical formulations include the organic compounds or pharmaceutically acceptable salts thereof and a pharmaceutically acceptable carrier and may be prepared by mixing the organic compounds or pharmaceutically acceptable salts of the organic compounds with a carrier and water. A method of treating a patient includes administering a pharmaceutical formulation according to the invention to a patient in need thereof.
Synthesis and electronic properties of expanded 5-(hetero)aryl-thien-2-yl substituted 3-ethynyl quinoxalines with AIE characteristics
作者:Franziska K. Merkt、Thomas J. J. Müller
DOI:10.1007/s11426-018-9295-4
日期:2018.8
emission color of the quinoxaline based chromophores can be conveniently accomplished by the remote substituent group. The determined absorption and emission maximum as well as the Stokes shifts strongly correlate with Hammett σp+ parameters. Besides, photophysical properties of selected derivatives in the solid state, biphasic solutions, and PMMA films, along with their relationships, are comparatively
Organic compounds having the structural formulas I, II, and III are provided where the variables have the values described herein and R
1
and R
2
in structure I join together to form a 5 to 7 membered substituted or unsubstituted ring including at least one O, N, or S atom, and Z is an O, S, NH or NR group in structures I and II.
1
Pharmaceutical formulations include the organic compound or a pharmaceutically acceptable salt thereof and a pharmaceutically acceptable carrier. A method of treating a patient includes administering a pharmaceutical formulation according to the invention to a patient in need thereof.
The present invention provides a polymerizable compound having high storage stability without causing crystal precipitation when added to a polymerizable composition. The present invention also provides a polymerizable composition containing the compound. When the filmy polymer produced through polymerization of the polymerizable composition is irradiated with UV light, it hardly discolors or peels from substrate. Further, the present invention provides a polymer produced through polymerization of the polymerizable composition and an optically anisotropic body using the polymer.