Magnesium promoted autocatalytic dehydrogenation of amine borane complexes: A reliable, non-cryogenic, scalable access to boronic acids
作者:Ludovic D. Marciasini、Jimmy Richard、Bastien Cacciuttolo、Guillaume Sartori、Melodie Birepinte、Laurent Chabaud、Sandra Pinet、Mathieu Pucheault
DOI:10.1016/j.tet.2018.11.036
日期:2019.1
access boronic acids. The intrinsic instability of magnesium aminoborohydride was tweaked into a tandem dehydrogenation borylation sequence. Proceeding via an autocatalytic cycle, amineborane dehydrogenation was induced by a variety of Grignard reagents. Overall, addition of the organomagnesium species onto specially designed dialkylamine-borane complexes led to a variety of boronic acids in high yields
Synthesis of Arylpalladium(II) Boronates: Confirming the Structure and Chemical Competence of Pre‐transmetalation Intermediates in the Suzuki–Miyaura Reaction
作者:Angus Olding、Curtis C. Ho、Allan J. Canty、Nigel T. Lucas、James Horne、Alex C. Bissember
DOI:10.1002/anie.202104802
日期:2021.6.25
in Suzuki–Miyauracross-couplings. While these typically transient species have been detected and studied spectroscopically, it is conspicuous that they have never been isolated since this important reaction was discovered over forty years ago. This study reports the synthesis of a family of unprecedented arylpalladium(II) boronates that are, by design, kinetically stable at ambienttemperature, both
钯 (II) 硼酸盐被认为是 Suzuki-Miyaura 交叉偶联中基本的预金属化中间体。虽然这些典型的瞬态物种已经被光谱检测和研究,但值得注意的是,自从四十多年前发现这一重要反应以来,它们从未被分离出来。这项研究报告了一系列前所未有的芳基钯 (II) 硼酸盐的合成,这些硼酸盐在环境温度下在溶液和固态下均具有动力学稳定性。这些特性首次实现了对其结构的明确晶体学确认,并证明了它们在 Suzuki-Miyaura 反应中的化学能力。