A Facile and Convenient Synthesis of Trisubstituted (<i>E</i>)-α,β-Unsaturated Esters by Tandem Acetylation-E1cB Reaction
作者:Minoru Ozeki、Ayumi Hachino、Takashi Shigeta、Aya Niki、Natsuko Kobayashi、Hideki Mizutani、Akihiro Nakamura、Ayano Horie、Kenji Arimitsu、Tetsuya Kajimoto、Shinzo Hosoi、Hiroki Iwasaki、Naoto Kojima、Masayuki Yamashita、Ikuo Kawasaki
DOI:10.1248/cpb.c18-00666
日期:2019.1.1
A facile and convenient synthesis of trisubstituted (E)-α,β-unsaturated esters was developed by improving our previously established method. The new method circumvented the separation of the intermediates, which have an activating group of the hydroxyl group in β-hydroxy esters, furnishing α,β-unsaturated esters in shorter steps than the previous method: an acetylation of β-hydroxy group and subsequent
通过改进我们先前建立的方法,开发了一种简便易行的三取代(E)-α,β-不饱和酯的合成方法。新方法规避了中间体的分离,该中间体在β-羟基酯中具有羟基的活化基团,与以前的方法相比,可在更短的步骤中提供α,β-不饱和酯:β-羟基的乙酰化和随后的E1cB反应一齐进行。另外,该新方法不仅可以将底物的非对映异构体混合物用于E1cB反应,而且具有广泛的底物范围,这将使得能够合成各种三取代的(E)-α,β-不饱和酯。