Synthesis of fatty ketoesters by tandem epoxidation–rearrangement with heterogeneous catalysis
作者:Vicente Dorado、Lena Gil、José A. Mayoral、Clara I. Herrerías、José M. Fraile
DOI:10.1039/c9cy01899a
日期:——
Fatty ketoesters are obtained from unsaturated fatty esters in a tandem two-step process with a combination of two heterogeneous catalysts, without intermediate purification and with maximum productivity of the catalysts through recycling and reuse.
Fatty acid based biocarbonates: Al-mediated stereoselective preparation of mono-, di- and tricarbonates under mild and solvent-less conditions
作者:L. Peña Carrodeguas、À. Cristòfol、J. M. Fraile、J. A. Mayoral、V. Dorado、C. I. Herrerías、A. W. Kleij
DOI:10.1039/c7gc01206c
日期:——
A catalytic method for the preparation of a series of fatty acid derived biocarbonates has been developed using a binary Al-complex/PPNCl catalyst. This catalyst system allows conversion of fatty acid derived epoxides under comparatively mild reaction conditions (70–85 °C, 10 bar) while maintaining high levels of diastereospecificity with cis/trans ratios of up to 97:3 in the products. The comparative
Influence of alkenyl structures on the epoxidation of unsaturated fatty acid methyl esters and vegetable oils
作者:Yao-Bing Huang、Meng-Yue Yao、Ping-Ping Xin、Meng-Chao Zhou、Tao Yang、Hui Pan
DOI:10.1039/c5ra11035a
日期:——
Epoxidation of vegetable oils or fatty acidmethylesters (FAMEs) produce important monomers which are widely used as plasticizers or stabilizers in the polymer industry. However, little attention has been focused on the influence of the alkenyl structure of the fatty acid on the efficiency and selectivity of their epoxidation. In this work, the influence of the alkenyl structure (the number of double bonds)
植物油或脂肪酸甲酯(FAME)的环氧化产生重要的单体,这些单体在聚合物工业中被广泛用作增塑剂或稳定剂。但是,很少有注意力集中在脂肪酸的烯基结构对其环氧化效率和选择性的影响上。在这项工作中,已研究了FAME的烯基结构(双键数)对环氧化反应的影响。使用弱酸(甲酸)和强酸(硫酸/乙酸)系统对具有1至3个双键的三个模型FAME进行环氧化。发现具有更多双键的FAME对环氧化反应具有更高的反应性。此外,脂肪酸链上双键的供电子作用趋于稳定与弱酸体系相邻的环氧化物。此外,具有更多双键的FAME容易与强酸体系发生副反应(H2 SO 4)。用相同的两种酸催化剂体系对具有不同脂肪酸组成的两种植物油进行环氧化。结果与FAME的结果一致。目前的发现可以为具有不同烯基结构组成的不同植物油的环氧化提供有用的指导。
GUNSTONE F. D.; SCHULER H. R., CHEM. AND PHYS. LIPIDS <CHIN-AG>, 1975, 15, NO 2, 174-188
作者:GUNSTONE F. D.、 SCHULER H. R.
DOI:——
日期:——
KURANOVA I. L.; CHETKOBA E. V.; GINDIN V. A., BECTH. LGU, 1978, HO 10, 140-144