Janicki Ignacy
Division of Organic Chemistry, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, ul. Sienkiewicza 112, 90-363 Łódź, Poland.
J Org Chem. 2025 Apr 25;90(16):5725-5728. doi: 10.1021/acs.joc.5c00470. Epub 2025 Apr 16.
Application of new reagents in the -selective synthesis of trisubstituted alkenes via modified Horner-Wadsworth-Emmons carbonyl olefination is presented. The reagents tested are ethyl bis(1,1,1,3,3,3-hexafluoroisopropyl)phosphonoalkanoates, structurally similar to Still-Gennari type reagents. A set of various trisubstituted -alkenes was obtained in very high or quantitative yields with excellent -selectivity. Remarkably, the procedure was very successful for the synthesis of -2-aryl-substituted cinnamic acid esters, maintaining exclusive -selectivity even at an increased temperature.
介绍了新型试剂在通过改进的霍纳-沃兹沃思-埃蒙斯羰基烯烃化反应选择性合成三取代烯烃中的应用。所测试的试剂是双(1,1,1,3,3,3-六氟异丙基)膦酰基链烷酸乙酯,其结构与斯蒂尔-根纳里型试剂相似。以非常高的产率或定量产率获得了一系列各种三取代的β-烯烃,具有优异的β-选择性。值得注意的是,该方法在合成β-2-芳基取代的肉桂酸酯方面非常成功,即使在升高的温度下也能保持唯一的β-选择性。