70 years, numerous catalyst systems have been developed that allow for highly linear-selective (anti-Markovnikov) reactions and are used in industry to produce linear carboxylates starting from olefins. In contrast, a general catalyst system for Markovnikov-selective alkoxycarbonylation of aliphatic olefins remains unknown. In this paper, we show that a specific palladiumcatalyst system consisting
作者:Wolny, Anna、Więcławik, Dagmara、Zdarta, Jakub、Jurczyk, Sebastian、Jesionowski, Teofil、Chrobok, Anna
DOI:10.1039/d4gc03821e
日期:——
industrial-scale continuous flow synthesis of esters from biomass-derived furfuryl alcohol (FA) and C8–C18 carboxylic acids was developed. Under optimized reaction conditions, lipase from Aspergillus oryzae immobilized on an octyl-silane MgO·SiO2 material demonstrated high activity. A conversion of 88.7–90.2% for FA with 100% selectivity to esters using a FA : fatty acid molar ratio of 1 : 3 and cyclohexane
开发了一种适合工业规模连续流动合成生物质衍生的糠醇(FA)和C 8 –C 18羧酸酯的可持续方法。在优化的反应条件下,固定化于辛基硅烷MgO·SiO 2材料上的米曲霉脂肪酶表现出较高的活性。使用 FA 与脂肪酸摩尔比为 1:3、以环己烷为溶剂、在 25 °C 下、在间歇系统中 45 分钟内,FA 的转化率为 88.7-90.2%,对酯的选择性为 100%。该生物催化剂在至少 10 个连续反应循环中保持其高活性。从间歇式反应器成功升级为连续流动反应器,使 FA 转化率提高高达 96.8%,试剂流速为 0.070 mL min -1 ,停留时间为 10.5 分钟。该生物催化剂在30小时内保持优异的性能。所开发的方法在绿色化学指标的框架内考虑,确保了催化剂的高活性、稳定性、可回收性和生物降解性之间的平衡。这项工作提出了一种绿色化学的通用方法,致力于支持增值化学品的生物催化连续流动合成。
Swern; Jordan, Journal of the American Chemical Society, 1948, vol. 70, p. 2335,2338
作者:Swern、Jordan
DOI:——
日期:——
HMF and furfural: Promising platform molecules in rhodium-catalyzed carbonylation reactions for the synthesis of furfuryl esters and tertiary amides
作者:Xinxin Qi、Rong Zhou、Han-Jun Ai、Xiao-Feng Wu
DOI:10.1016/j.jcat.2019.11.008
日期:2020.1
esters and tertiary amides has been developed. 5-Hydroxymethylfurfural (HMF) was used as both substrate and CO surrogate for the first time in a carbonylation reaction, and both alkyl and aryl iodides were tolerated well to afford the desired furfuryl esters in moderate to good yields. In addition, furfural was also utilized as a CO source for the synthesis of tertiary amides. A variety of tertiary amides