Role of Benzylic Deprotonation in Nickel-Catalyzed Benzylic Dehydrogenation
作者:Timothy R. Newhouse、Pengpeng Zhang、Rachel L. Cantrell
DOI:10.1055/s-0040-1720446
日期:2021.10
functionalized via the corresponding benzylic anions. Benzylic anions have been used for a range of catalytic reactions, including Ni-catalyzed dehydrogenation. Interestingly, the employment of Zn(TMP)2 for slow and incomplete deprotonation of the benzylic position was observed. This manuscript describes a preliminary investigation into the deprotonation of heteroarenes and its relationship to Ni-catalyzed
烷基芳烃很容易通过相应的苄基阴离子进行功能化。苄基阴离子已用于一系列催化反应,包括镍催化脱氢。有趣的是,观察到使用Zn(TMP) 2来缓慢且不完全地去质子化苄位。这份手稿描述了对杂芳烃的去质子化及其与 Ni 催化的苄基脱氢的关系的初步调查。
Coordination‐Controlled Nickel‐Catalyzed Benzylic Allylation of Unactivated Electron‐Deficient Heterocycles
作者:Pengpeng Zhang、Jin Wang、Zoe R. Robertson、Timothy R. Newhouse
DOI:10.1002/anie.202200602
日期:2022.5.23
A nickel-catalyzed benzylic allylation and benzylation of 14 types of unactivated heterocyclic aromatic compounds is described. The selective deprotonation of benzylic sites is hypothesized to be controlled by the original coordination of a heterocyclic nitrogen to Zn(TMP)2. In addition to the pro-nucleophiles, readily available bromide and chloride electrophiles could be used.