Novel Hydrophobic Brønsted Acidic Ionic-liquids as Efficient and Reusable Catalysts for Organic Reactions in Water
作者:Yanlong Gu、Chikako Ogawa、Shu Kobayashi
DOI:10.1246/cl.2006.1176
日期:2006.10
Novel hydrophobic Brønsted acidic ionic liquids (HBAIL) were prepared and utilized as acid catalysts in organic reactions in water. HBAILs were demonstrated, for the first time, to be effective catalysts for Prins cyclization of styrene derivatives in water with a formaldehyde water solution. Many styrene derivatives could be successfully converted to the corresponding 1,3-dioxanes. Other dehydration reactions also proceeded well using HBAILs in water. After reactions, HBAILs could be easily recovered and reused without significant loss of activity.
制备了一系列新型疏水性布朗斯台德酸性离子液体(HBAIL),并将其作为酸催化剂应用于水中有机反应。首次证明HBAIL在水溶液中对苯乙烯衍生物的Prins环化反应具有高效催化作用,使用甲醛水溶液作为反应物。众多苯乙烯衍生物能够成功转化为相应的1,3-二氧环戊烷。在水中的其他脱水反应也能很好地利用HBAIL进行。反应后,HBAIL可以轻松回收并重复使用,活性损失不大。