Application of 11B NMR spectroscopy to the study of the reactivity of ortho substituted anilines with BH3.THF—I. Formation reactions of new boron heterocycles
Studies on aromatic amine boranes by 11B and 1H NMR
作者:C. Camacho、M.A. Paz-Sandoval、R. Contreras
DOI:10.1016/s0277-5387(00)84849-4
日期:——
Abstract 1 H and 11 B NMR spectroscopy was applied to mono- and bisboraneadducts derived from aryl-, benzyl-, phenethyl- and phenylenediamines, but no simple relationship was established between the spectroscopic data and the nature of the NB bond. Comparative studies of the affinity of aromatic amines to BH 3 by equilibria reactions may be of great value in establishing a scale of relative basicity
摘要1 H和11 B NMR光谱用于衍生自芳基,苄基,苯乙基和苯二胺的单和双硼烷加合物,但光谱数据与NB键的性质之间没有简单的关系。通过平衡反应对芳香胺对BH 3的亲和力进行比较研究可能对建立相对碱性的规模具有重要价值。
Dehydrogenative Diboration of Alkynes Catalyzed by Ir/CO/tBuNC System
作者:Qingheng Lai、Oleg V. Ozerov
DOI:10.1016/j.jorganchem.2020.121614
日期:2021.1
dehydrogenative diboration (DHDB) of alkyne with HBpin was achieved using [Ir(COD)Cl]2 and other related Ir precursors under CO atmosphere. The selectivity for DHDB over hydroboration was higher in less polar solvents and under higher CO pressure. It was further improved when catalytic amount of tBuNC was added to the reaction. It was possible to achieve DHDB of both terminal and internal alkynes with selectivity
Reversible carbon–boron bond formation at platinum centers through σ-BH complexes
作者:Pablo Ríos、Rocío Martín-de la Calle、Pietro Vidossich、Francisco José Fernández-de-Córdova、Agustí Lledós、Salvador Conejero
DOI:10.1039/d0sc05522k
日期:——
one of which has been isolated. From −15 to +10 °C, the σ-BH species undergo a carbon–boron coupling process leading to the platinum hydride derivative [Pt(H)(ItBuiPr–BR2)(ItBuiPr)][BArF], 4. Surprisingly, these compounds are thermally unstable undergoing carbon–boron bond cleavage at room temperature that results in the 14-electron Pt(II) boryl species [Pt(BR2)(ItBuiPr)2][BArF], 2. This unusual reaction
可逆碳-硼键的形成已在配位不饱和,环金属,Pt组成的反应(观察到II复合物)[PT(I吨卜我PR')(I吨卜我PR)] [BAR ˚F ],1,与三配位硼烷HBR 2。X射线衍射研究提供了该过程涉及的反应序列的结构快照。在低温下,我们观察到了前所未有的σ-BH配合物[Pt(HBR 2)(I t Bu i Pr')(I t Bu i Pr)] [BAr F],其中之一已被隔离。从-15到+10°C,σ-BH物质经历碳-硼偶联过程,导致氢化铂衍生物[Pt(H)(I t Bu i Pr–BR 2)(I t Bu i Pr)]。 [BAr F ],4。出乎意料的是,这些化合物是热不稳定的,在室温下会经历碳-硼键断裂,从而产生14电子的Pt(II)硼基物质[Pt(BR 2)(I t Bu i Pr)2 ] [BAr F ],2。这种不寻常的反应过程已通过计算方法得到证实,这表明碳-硼偶联产物4是在动
Synthesis of a Metallo-Iminosilane via a Silanone-Metal π-Complex
作者:Terrance J. Hadlington、Tibor Szilvási、Matthias Driess
DOI:10.1002/anie.201708923
日期:2017.11.6
A piece of π: An acyclic silylene–Ni0 complex undergoes facile oxidation with N2O to give silanone–Ni0 π-complex 1 at low temperature. Upon warming, a cascade rearrangement takes place that exclusively yields the Si-metalated iminosilane 3. Remarkably, the Si=O and Si=N bonds in these complexes readily undergo addition reactions with hydroboranes even though such processes typically require a catalyst