Selective synthesis of unsymmetrical ethers from different alcohols catalyzed by sodium bisulfite
作者:Jun-Lai Yu、Hui Wang、Kai-Feng Zou、Jia-Rui Zhang、Xiang Gao、Dan-Wei Zhang、Zhan-Ting Li
DOI:10.1016/j.tet.2012.10.032
日期:2013.1
ethers from alcohols catalyzed by sodium bisulfite is reported. The procedure enables the direct dehydration of primary, secondary, and tertiary benzylic alcohols with aliphatic alcohols in the absence of solvent to selectively produce unsymmetrical ethers in high yields with low catalyst loading. No symmetrical ethers are generated in the reactions. The etherification of a chiral secondary benzyl alcohol
报道了一种由亚硫酸氢钠催化的醇制备不对称醚的有效方法。该方法能够在不存在溶剂的情况下将伯,仲和叔苄醇与脂肪醇直接脱水,从而以高收率和低催化剂负载选择性地生产不对称醚。反应中不生成对称的醚。手性仲苄醇与丁醇的醚化仅产生外消旋醚,表明该反应涉及碳正离子中间机理。