Gold(I)-Catalyzed Decarboxylation of Propargyl Carbonates: Reactivity Reversal of the Gold Catalyst from<i>π</i>-Lewis Acidity to<i>σ</i>-Lewis Acidity
作者:Ruwei Shen、Jianjun Yang、Shugao Zhu、Chao Chen、Luling Wu
DOI:10.1002/adsc.201401094
日期:2015.4.13
A cationic gold(I)‐catalyzed decarboxylative etherification of propargyl carbonates to selectively produce propargyl ethers is reported. In the reaction the gold(I) catalyst shows a distinct σ‐Lewis acidity rather than the commonly observed π‐Lewis acidity, and thus catalyzes the decarboxylation of a variety of propargyl carbonates to give the corresponding propargyl ethers with high selectivity. This
据报道,阳离子金(I)催化炔丙基碳酸酯的脱羧醚化反应以选择性地产生炔丙基醚。在该反应中,金(I)催化剂显示出明显的σ-路易斯酸度,而不是通常观察到的π-路易斯酸度,因此催化了各种炔丙基碳酸酯的脱羧反应,从而提供了具有高选择性的相应炔丙基醚。该反应代表了σ-刘易斯酸度和π-刘易斯酸度之间阳离子金(I)配合物的可调反应性的罕见例子。