Directed <i>ortho</i>
-Metalation of Aryl Amides, <i>O-</i>
Carbamates, and Methoxymethoxy Systems: Directed Metalation Group Competition and Cooperation
作者:M. A. Jalil Miah、Mukund P. Sibi、S. Chattopadhyay、Oluwole B. Familoni、Victor Snieckus
DOI:10.1002/ejoc.201701143
日期:2018.1.31
metalation-electrophile quench of 1,2- and 1,4-O-carbamates (Scheme 2) and iterative metalation procedures (Scheme 3) is presented. The results provide new methodology for the synthesis of functionalized contiguously 1,2,3- and 1,2,3,4-substituted aromatic derivatives of difficult accessibility and potential broad utility. A comparison of the present methodology with previously developed routes is given in selected
描述了与 OCONEt2 DMG 相比,四种定向金属化基团 (DMG) 衍生物(DMG = Cl、OMe、OMOM 和 CONEt2)的竞争性金属化的系统研究(表 2)。此外,还介绍了阴离子邻位 Fries (AoF) 重排(表 3)、1,2- 和 1,4-O-氨基甲酸酯的双金属化-亲电子猝灭(方案 2)和迭代金属化程序(方案 3)。该结果为合成功能化的连续 1,2,3- 和 1,2,3,4- 取代的芳烃衍生物提供了新的方法,这些衍生物难以获得且具有潜在的广泛用途。本方法与以前开发的路线的比较在选定的实施例中给出,重点是这些取代的化合物(表 5)。