In this work, we disclose a new catalytic and highly chemoselective cross-Claisen condensation of esters. In the presence of TBSNTf2 as a non-metal Lewis acid, various esters can undergo cross-Claisen condensation to form β-keto esters which are important building blocks. Compared with the traditional Claisen condensation, this process, employing silyl ketene acetals (SKAs) as carbonic nucleophiles
在这项工作中,我们公开了一种新的催化和高度
化学选择性的酯交叉克莱森缩合。在作为非
金属
路易斯酸的 TBSNTf 2存在下,各种酯可以进行交叉克莱森缩合以形成β-
酮酯,这是重要的结构单元。与传统的克莱森缩合相比,该工艺以甲
硅烷基
乙烯酮缩醛(SKAs)为含碳亲核试剂实现交叉克莱森缩合,条件温和,官能团耐受性好。