Tandem Remote Csp<sup>3</sup>–H Activation/Csp<sup>3</sup>–Csp<sup>3</sup> Cleavage in Unstrained Aliphatic Chains Assisted by Palladium(II)
作者:Marta Pérez-Gómez、Hamid Azizollahi、Ivan Franzoni、Egor M. Larin、Mark Lautens、José-Antonio García-López
DOI:10.1021/acs.organomet.8b00920
日期:2019.2.25
We report here a proof-of-concept for the cleavage of unstrained remote Csp3–Csp3 bonds at room temperature assisted by a directing group, opening up new possibilities to use aliphatic carboxylic acids as suitable alkenyl coupling partners. This strategy involves the Pd-mediated Csp3–H activation directed by a tethered 8-aminoquinoline group, followed by a concerted asynchronous carbene insertion into
我们在这里报告了一个概念证明,在室温下一个定向基团的协助下,未应变的远端Csp 3 -Csp 3键断裂,为使用脂肪族羧酸作为合适的烯基偶联伙伴开辟了新的可能性。该策略涉及受束缚的8-氨基喹啉基团引导的Pd介导的Csp 3 -H活化,随后是协调一致的卡宾插入Pd-C键中,以及意想不到的β-碳-碳键分裂。在Pd–C键中插入偶联伴侣是促进C–C键裂解的一种新颖途径,与大多数常用方法相反,它不依赖使用应变碳环。