作者:Carine E. Chan-Thaw、Marcello Marelli、Rinaldo Psaro、Nicoletta Ravasio、Federica Zaccheria
DOI:10.1039/c2ra23043g
日期:——
Ethyl valerate and pentyl valerate, suitable as a gasoline additive and diesel component respectively, can be obtained in a one pot one step reaction from γ-valerolactone, readily available from lignocellulosic biomass. The reaction takes place in ethanol under H2 through nucleophilic addition of the alcohol to the carboxylic group giving hydroxypentanoate, dehydration to pentenoate and hydrogenation to the saturated ester. The bifunctional catalyst used consists of a non noble metal, namely copper, supported on an amorphous weakly acidic material, therefore representing an interesting alternative to Ptâzeolite catalysts. Pentyl valerate can be obtained in one pot with conversions >90% and selectivity up to 83%.
乙基戊酸酯和戊基戊酸酯分别作为汽油添加剂和柴油成分,可以通过从γ-戊内酯进行的一锅一步反应获得,该化合物可以从 lignocellulosic 生物质中获得。反应在乙醇中进行,使用氢气通过醇对羧基的亲核加成反应生成羟基戊酸酯,再进行脱水反应生成戊烯酸酯,并进行氢化反应生成饱和酯。所用的双功能催化剂由一种非贵金属(铜)和一种非晶弱酸材料组成,因此成为铂-沸石催化剂的有趣替代品。戊基戊酸酯可以在一锅中获得,转化率超过90%,选择性高达83%。