Highly concentrated microcrystalline cellulose was directly converted to isosorbide with yields of 35–50%, providing a new approach for producing important fine chemicals from biomass.
[EN] IONIZABLE LIPIDS FOR NUCLEIC ACID DELIVERY<br/>[FR] LIPIDES IONISABLES POUR L'ADMINISTRATION D'ACIDES NUCLÉIQUES
申请人:PREC NANOSYSTEMS INC
公开号:WO2021000041A1
公开(公告)日:2021-01-07
The present document describes compounds, or pharmaceutically acceptable salt thereof, of a core formula (I) Wherein R1 includes an amino group. These compounds are particularly useful in the formulation and in vivo and ex vivo delivery of nucleic acid and protein therapeutics for preparing and implementing T cell transfection, gene editing, cancer therapies, cancer prophylactics, and in the preparation of vaccines.
Sequential dehydration of sorbitol to isosorbide over acidified niobium oxides
作者:Jiaxing Guo、Yongji Song、Shanshan Liu、Long Huang、Xincheng Wang、Shanshan Liu、Cuiqing Li
DOI:10.1039/d1cy00326g
日期:——
was related to the surface acidity, including the reaction temperature and the amount of catalysts. After optimization of reaction conditions, the yield of isosorbide reached 84.1% with complete sorbitol conversion during reaction at 150 °C for 3 h over 2 M sulfuricacid modified Nb2O5. Finally, the reaction mechanism regarding the role of Lewis acid sites was discussed. This study is of great significance
异山梨醇是一种生物基功能性二醇,可通过对山梨糖醇进行连续脱水制得,广泛用于增塑剂,单体,溶剂或药物中。在这项研究中,制备了多种酸化的Nb 2 O 5催化剂,并用于将山梨糖醇依次脱水为异山梨醇。酸化可以有效地调节催化剂的表面酸度,这是通过吡啶红外光谱法和NH 3 -TPD分析来测量的。催化性能与表面酸度有关,包括反应温度和催化剂量。优化反应条件后,在2 M硫酸改性的Nb上于150°C反应3 h期间,山梨糖醇完全转化,异山梨醇的收率达到84.1%2 O 5。最后,讨论了有关路易斯酸位点作用的反应机理。这项研究对于进一步开发一种有效的催化体系,将碳水化合物脱水为异山梨醇具有重要意义。
Hydrophilic sulfonic acid-functionalized micro-bead silica for dehydration of sorbitol to isosorbide
The large pore diameter and hydrophilic surface of SA-SiO2-60.5 are beneficial to sorbitol adsorption and isosorbide desorption, and inhibit the deposition of coke.
SA-SiO2-60.5的大孔径和亲水表面有利于山梨醇吸附和异山梨醇解吸,并抑制焦炭的沉积。
Hydrolysis of glycosides under reducing conditions
作者:Per J. Garegg、Bengt Lindberg、Peter Konradsson、Ingemar Kvarnström