reaction of lithium N-trimethylsilyl-amides of the type RN(SiMe3)Li with bismuth(III) chloride yielded mono-, di- or triaminobismuthanes depending on the sterical demand of the anilide ligand R and the used stoichiometry. For the bulky Mes* substituent the reaction with BiCl3 resulted in the formation of a C–C coupling product as the main product besides a small amount of the expected Mes*N(SiMe3)BiCl2
One-Pot C−H Functionalization of Arenes by Diaryliodonium Salts
作者:Marcus Reitti、Piret Villo、Berit Olofsson
DOI:10.1002/anie.201603175
日期:2016.7.25
concept has been extended to formation of aryl azides, and constitutes an important step towards catalytic reactions with these hypervalent iodine reagents. An efficient nitration of isolated diaryliodoniumsalts has also been developed, and the mechanism is proposed to proceed by a [2,2] ligand coupling pathway.
Mechanistic Insight into NN Cleavage by a Low-Coordinate Iron(II) Hydride Complex
作者:Azwana R. Sadique、Elizabeth A. Gregory、William W. Brennessel、Patrick L. Holland
DOI:10.1021/ja069199r
日期:2007.7.1
The reaction pathways of high-spin iron hydride complexes are relevant to the mechanism of N2 reduction by nitrogenase, which has been postulated to involve paramagnetic iron-hydride species. However, almost all known iron hydrides are low-spin, diamagnetic Fe(II) compounds. We have demonstrated that the first high-spin iron hydride complex, LtBuFeH (LtBu = bulky beta-diketiminate), reacts with PhN=NPh
高自旋氢化铁配合物的反应途径与固氮酶还原 N2 的机制有关,据推测,这涉及顺磁性氢化铁物种。然而,几乎所有已知的氢化铁都是低自旋、抗磁性的 Fe(II) 化合物。我们已经证明第一个高自旋氢化铁络合物 LtBuFeH(LtBu = 大体积 β-二酮亚胺)与 PhN=NPh 反应以完全裂解 NN 双键,得到 LtBuFeNHPh。在这里,我们公开了一系列实验来阐明该反应的机制。交叉和动力学实验排除了常见的非自由基机制,并支持由铁 (I) 物种介导的自由基链机制,包括罕见的 eta2-偶氮苯络合物。因此,这种高自旋氢化铁(II)可以通过非自由基和自由基插入机制破坏 NN 键,
Pseudorotaxanes and Rotaxanes Incorporating Cycloheptatrienyl Stations − Synthesis and Co-Conformation
According to the 1H NMR spectra, the tetracationic ring undergoes a fast shuttling process between the two cycloheptatriene stations in the rotaxanes. The unexpected signal dispersion of the cyclophane proton resonances is attributable to the existence of two diastereomeric rotaxanes. It was shown that interaction between the recognition sites is strongly influenced by the substitution pattern on the seven-membered
The photochemistry of various types of hindered nitrobenzenes, inparticular 2,6-diakyl-substituted nitrobenzenes, has been investigated. Depending on steric factors, two types of reaction were observed. One, the photochemical reduction and nitro-nitrite rearrangement depending on the solvent employed, and the other, the intramolecular oxygen transfer reaction involving α- and β-carbon atom attack of