Reductive Etherification via Anion-Binding Catalysis
作者:Chenfei Zhao、Christopher A. Sojdak、Wazo Myint、Daniel Seidel
DOI:10.1021/jacs.7b05832
日期:2017.8.2
Reductive condensations of alcohols with aldehydes/ketones to generate ethers are catalyzed by a readily accessible thiourea organocatalyst that operates in combination with HCl. 1,1,3,3-tetramethyldisiloxane serves as a convenient reducing reagent. This strategy is applicable to challenging substrate combinations and exhibits functional group tolerance. Competing reductive homocoupling of the carbonyl
Synthesis of Dialkyl Ethers from Organotrifluoroborates and Acetals
作者:T. Andrew Mitchell、Jeffrey W. Bode
DOI:10.1021/ja906514s
日期:2009.12.23
The formation of ethers by C-O bond formation under harsh basic or acidic conditions is an entrenched synthetic disconnection in organic chemistry. We report a strategic alternative that involves the BF(3).OEt(2)-promoted coupling of stable, easily prepared acetals with widely available potassium aryl-, alkenyl-, and alkynyltrifluoroborates. This fast, operationally simple process offers straightforward
在苛刻的碱性或酸性条件下通过 CO 键形成形成醚是有机化学中根深蒂固的合成断开。我们报告了一种战略替代方案,涉及 BF(3).OEt(2) 促进的稳定、易于制备的缩醛与广泛可用的芳基-、烯基-和炔基三氟硼酸钾的偶联。这种快速、操作简单的过程提供了直接获得二烷基醚的途径,其中许多使用经典方法难以制备。使用 MOM 保护的醇和缩醛保护的醛可以形成醚,而无需求助于保护基操作或强碱。