Instituto de Tecnología Química (UPV-CSIC), Universitat Politècnica de València, Avda dels Tarongers s/n, 46022, Valencia, Spain.
ChemSusChem. 2020 Feb 21;13(4):707-714. doi: 10.1002/cssc.201903496. Epub 2020 Jan 30.
Biomass-derived surfactants with very good surface tension and critical micellar concentration properties were obtained by conversion of methyl levulinate into methyl 4-alkoxypentanoates through reductive etherification with aliphatic alcohols. Among different bifunctional acid/metal catalysts best results were obtained with Pd on carbon bearing acid sites. The reaction occurred through the formation of an enol ether intermediate followed by hydrogenation. Pd in high-density planes was the active hydrogenation species, and an optimum crystal size was found to be approximately 10 nm. The reductive etherification with aliphatic alcohols was extended to other aliphatic and cyclic ketones and aldehydes obtained from biomass, and excellent results were obtained on supported Pd catalysts with the reaction route and experimental conditions described in this work.
通过将甲基戊酸酯还原醚化转化为脂肪醇的 4-烷氧基戊酸甲酯，得到具有非常好的表面张力和临界胶束浓度特性的生物量衍生表面活性剂。在不同的双功能酸/金属催化剂中，载酸位的钯炭具有最佳的效果。反应通过形成烯醇醚中间体，然后进行加氢反应。高密平面上的 Pd 是活性加氢物种，发现最佳的晶体尺寸约为 10nm。该还原醚化反应扩展到其他从生物质中获得的脂肪族和环状酮和醛，在本文所述的反应路线和实验条件下，负载 Pd 催化剂上得到了优异的结果。
