Catalytic Activation of Trimethylsilylacetylenes: A One-Pot Route to Unsymmetrical Acetylenes and Heterocycles
作者:Dániel Lasányi、Ádám Mészáros、Zoltán Novák、Gergely L. Tolnai
DOI:10.1021/acs.joc.8b00998
日期:2018.8.3
the synthesis of unsymmetrical acetylenes, a Sonogashira coupling–deprotection–Sonogashira coupling reaction sequence is often used. Removal of protecting groups requires harsh conditions or an excess of difficult to handle and expensive reagents. Herein, we disclose a novel catalytic method for the selective deprotection of trimethylsilylacetylenes in Sonogashira reaction. The reagent hexafluorosilicic
对于不对称乙炔的合成,通常使用Sonogashira偶联-去保护-Sonogashira偶联反应顺序。除去保护基需要苛刻的条件或过多的难以处理和昂贵的试剂。在这里,我们公开了一种新颖的催化方法,用于在Sonogashira反应中选择性脱保护三甲基甲硅烷基乙炔。六氟硅酸试剂是一种廉价的无毒化合物,用于促进选择性去甲硅烷基化。该方法能够有效地合成存在其他甲硅烷基化官能团的不对称乙炔。通过杂环的合成探索了该方法的其他可能性。