B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>-Catalyzed Chemoselective Defunctionalization of Ether-Containing Primary Alkyl Tosylates with Hydrosilanes
作者:Indranil Chatterjee、Digvijay Porwal、Martin Oestreich
DOI:10.1002/anie.201611813
日期:2017.3.13
cleavage promoted by B(C6F5)3 /Et3SiH proceeds preferentially with primary tosylates in the presence of primary and secondary silyl ethers and aryl ethers. This reactivity difference enables the chemoselective defunctionalization of several 1,n‐diols, and the efficiency of the new procedure is highlighted by the selective deoxygenation of the hydroxymethyl group of an orthogonally protected carbohydrate. Tosylates
在伯和仲甲硅烷基醚和芳基醚的存在下,由B(C 6 F 5)3 / Et 3 SiH促进的催化C(sp 3)-O键裂解优先与伯甲苯磺酸盐一起进行。这种反应性的差异使几种1,n-二醇的化学选择性脱官能化,并且正交保护的碳水化合物的羟甲基选择性脱氧突出了新方法的效率。具有邻苯基的甲苯磺酸酯在邻氨基苯甲酸辅助下被裂解。