Role of Hydrogen Bonding in Phase Change Materials
作者:Karolina Matuszek、R. Vijayaraghavan、Mega Kar、Douglas R. MacFarlane
DOI:10.1021/acs.cgd.9b01541
日期:2020.2.5
of fusion (ΔHf) and is often connected to the extent of hydrogenbonding in the PCM. Herein, we report fundamental studies, including crystal structure and Hirshfeld surface analysis, of a family of guanidinium organic salts that exhibit high values of ΔHf , demonstrating that the presence and strength of H-bonds between ions play a key role in this property.
Development of Scalable Synthesis of 5-Butyl-4-(4-methoxyphenyl)-6-phenylpyrimidin-2-amine (WQE-134), a Dual Inhibitor of Nitric Oxide and Prostaglandin E<sub>2</sub> Production
We report a scalable efficientsynthesis of 5-butyl-4-(4-methoxyphenyl)-6-phenylpyrimidin-2-amine (WQE-134), a dual inhibitor of nitric oxide and prostaglandin E2 production with potent anti-inflammatory properties. The original five-step synthesis (40% overall yield) was based on two Suzuki–Miyaura reactions and required chromatographic purification of both the intermediate and final products. The
我们报告了5-丁基-4-(4-甲氧基苯基)-6-苯基嘧啶-2-胺(WQE-134)的可扩展有效合成方法,这是一氧化氮和前列腺素E 2生产的双重抑制剂,具有强大的抗炎特性。最初的五步合成(总收率40%)基于两个Suzuki-Miyaura反应,并且需要对中间产物和最终产物进行色谱纯化。新颖的合成途径是基于使用伊顿试剂(P 2 O 5)将2-丁基-1-(4-甲氧基苯基)-3-苯基丙烷-1,3-二酮与甲磺酸胍环化/ MsOH)在50°C下。两步合成法(总收率34%)可以在几克到千克的范围内进行,最终产物的纯化包括简单的萃取(二氯甲烷)和结晶(乙酸乙酯和甲醇)。