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。