Effective Synthesis of 5-Substituted Butenolide Derivatives by Using Cinchonidine-derived Quaternary Ammonium Phenoxide Catalyst
作者:Hitoshi Nagao、Yoshinobu Yamane、Teruaki Mukaiyama
DOI:10.1246/cl.2007.8
日期:2007.1
A vinylogous aldol-type reaction between 4-methyl-2-(trimethylsiloxy)furan and aldehydes catalyzed by cinchonidine-derived quaternary ammonium phenoxide proceeded smoothly to afford the corresponding 5-substituted butenolide derivatives in high yields with good to excellent diastereo- and enantio-selectivities.
在源自辛可尼丁的季铵盐酚催化下,4-甲基-2-(三甲基硅氧基)呋喃与醛之间发生了乙烯基醛醇型反应,反应顺利进行,并以高产率和良好乃至优异的非对映及对映选择性得到了相应的 5-取代丁烯内酯衍生物。