synthesizing the target molecules. The perfect chemoselectivity between aromatic and aliphatic aldehydes is difficult to achieve by the previous methods. The aromatic aldehyde-selective nucleophilic addition in the presence of aliphatic aldehydes was newly accomplished. Namely, the aromatic aldehyde-selective nucleophilic addition using arenes and allyl silanes proceeded in the presence of trialkylsilyl
新型
化学选择性功能化的发展可以使合成靶分子的策略多样化。用以前的方法很难达到芳族和脂族醛之间的完美
化学选择性。新近完成了在脂肪族醛存在下的
芳香族醛选择性亲核加成反应。即,使用
芳烃和烯丙基
硅烷的芳族醛选择性亲核加成在三烷基甲
硅烷基
三氟甲磺酸酯和
2,2'-联吡啶基的存在下进行,而脂族醛完全保持不变。衍生自芳族醛的反应性
吡啶鎓盐类中间体经过
化学选择性亲核取代。而且,作为保护醛的
芳香族缩醛可以直接转化为类似的
吡啶鎓盐中间体,