Room-Temperature Amination of Deactivated Aniline and Aryl Halide Partners with Carbonate Base Using a Pd-PEPPSI-IPent<sup>Cl</sup>-<i>o</i>-Picoline Catalyst
作者:Matthew Pompeo、Jennifer L. Farmer、Robert D. J. Froese、Michael G. Organ
DOI:10.1002/anie.201310457
日期:2014.3.17
state‐of‐the‐art protocols for the coupling of unreactive amines (e.g., electron‐poor anilines) with deactivated oxidative‐addition partners (e.g., electron‐rich and/or hindered aryl chlorides) involve strong heating (usually >100 °C) and/or tert‐butoxide base, and even then not all couplings are successful. The aggressive base tert‐butoxide reacts with and in many instances destroys the typical functional
当前用于将未反应的胺(例如,电子贫乏的苯胺)与失活的氧化加成伙伴(例如,富电子和/或受阻的芳基氯化物)偶联的最新技术方案涉及强力加热(通常> 100° C)和/或叔丁氧基碱,即使如此,并非所有的偶联都成功。侵蚀性的叔丁醇叔丁基醚与之反应,并在许多情况下破坏了大多数有机分子的功能所必需的典型官能团,例如羰基,酯,腈,酰胺,醇和胺。当在室温下仅使用碳酸盐碱时,本文所述的新型催化剂Pd-PEPPSI-IPent Cl - o -picoline能够胺化严重失活的偶合对。
NIXANTPHOS: a highly active ligand for palladium catalyzed Buchwald–Hartwig amination of unactivated aryl chlorides
作者:Jianyou Mao、Jiadi Zhang、Shuguang Zhang、Patrick J. Walsh
DOI:10.1039/c8dt01852a
日期:——
catalyzed Buchwald–Hartwigamination reactions, because of its broad scope and high probability of success. It does not, however, work well with unactivated arylchlorides. Herein NIXANTPHOS is compared to Xantphos and an array of mono- and bidentate phosphines. NIXANTPHOS outperforms Xantphos and all other bidentate ligands examined. Under the optimal reaction conditions, unactivated arylchlorides afford