Palladium‐Catalyzed Dearomative
<i>syn</i>
‐1,4‐Carboamination with Grignard Reagents
作者:Conghui Tang、Mikiko Okumura、Yunbo Zhu、Annie R. Hooper、Yu Zhou、Yu‐Hsuan Lee、David Sarlah
DOI:10.1002/anie.201905021
日期:2019.7.22
functionalization of simple, nonactivated arenes with Grignardreagents has been established. This one‐pot method features a visible‐light‐mediated [4+2] cycloaddition between an arene and an arenophile, and subsequent palladium‐catalyzed allylic substitution of the resulting cycloadduct with a Grignardreagent. A variety of arenes and Grignardreagents can participate in this process, forming carboaminated
Nickel(II) complexes of ring-contracted 9-methylisocorroles were prepared by templated macrocyclisation and act as the first porphyrinoid catalysts for C–C cross-coupling.
镍(II)络合物通过模板驱动的大环化制备,作为第一个卟啉类催化剂参与C-C交叉偶联反应。
Selective Late‐Stage Hydrodefluorination of Trifluoromethylarenes: A Facile Access to Difluoromethylarenes
作者:Socrates B. Munoz、Chuanfa Ni、Zhe Zhang、Fang Wang、Nan Shao、Thomas Mathew、George A. Olah、G. K. Surya Prakash
DOI:10.1002/ejoc.201700396
日期:2017.4.26
A selective reductive monodefluorination reaction of trifluoromethyl arenes was developed. Mediated by magnesium metal, various difluoromethylated aromatics were accessed at room temperature in the presence of acetic acid. This protocol shows tolerance to a wide range of functional groups and it was applicable in late-stage hydrodefluorination of complex pharmaceutical compounds, affording the corresponding
作者:Lucas W. Hernandez、Ulrich Klöckner、Jola Pospech、Lilian Hauss、David Sarlah
DOI:10.1021/jacs.8b01726
日期:2018.4.4
We describe the development of an arenophile-mediated, nickel-catalyzed dearomative trans-1,2-carboamination protocol. A range of readily available aromatic compounds was converted to the corresponding dienes using Grignard reagents as nucleophiles. This strategy provided products with exclusive trans-selectivity and high enantioselectivity was observed in case of benzene and naphthalene. The utility