Highly Discriminative and Chemoselective Deprotection/Transformations of Acetals with the Combination of Trialkylsilyl Triflate/2,4,6-Collidine
作者:Reiya Ohta、Nao Matsumoto、Yoshifumi Ueyama、Yuichi Kuboki、Hiroshi Aoyama、Kenichi Murai、Mitsuhiro Arisawa、Tomohiro Maegawa、Hiromichi Fujioka
DOI:10.1021/acs.joc.8b00675
日期:2018.6.15
developed a chemoselective deprotection and nucleophilic substitution of acetals from aldehydes in the presence of ketals. This article describes the highly discriminative and chemoselective transformations of acetals bearing different substitution patterns, different types of acetals, as well as mixed acetals. These reactions can achieve the transformations that cannot be attained by conventional methods,
缩醛是羰基官能团最有用的保护基。除了保护作用外,它们还可用作羰基官能团的合成子。以前,我们开发了在缩酮存在下从醛类中缩醛的化学选择性脱保护和亲核取代。本文介绍了具有不同取代模式,不同类型的缩醛以及混合缩醛的缩醛的高判别和化学选择性转化。这些反应可以实现常规方法无法实现的转化,其结果强烈表明,R 3 SiOTf / 2,4,6-可力丁的组合可促进这种前所未有的现象。