Readily Removable Directing Group Assisted Chemo- and Regioselective C(sp<sup>3</sup>)H Activation by Palladium Catalysis
作者:Yun-Fei Zhang、Hong-Wei Zhao、Hui Wang、Jiang-Bo Wei、Zhang-Jie Shi
DOI:10.1002/anie.201505932
日期:2015.11.9
Currently used directing groups for selective aliphatic β‐functionalization of carbonyl compounds show excellent reactivity and selectivity with an amide as a linker. Described herein is 2‐piconimide, used for the first time with commercially available 2‐picolinamide/2‐picolic acid as precursors, to direct CH arylation/alkenylation by palladium catalysis. The directing group is essential for promoting
当前使用的用于羰基化合物的选择性脂族β-官能化的导向基团以酰胺为连接基表现出出色的反应性和选择性。本文中描述为2- piconimide,用于第一时间与市售2-吡啶甲酰胺/ 2- picolic酸作为前体,以引导Ç ħ芳基化/通过钯催化烯基化。的引导组是用于促进sequnetial伯和仲C(SP必不可少3) ħ芳基化与不同的芳基碘化物在一个衬底。在室温下,在简单的反应条件下,容易除去导向基团。