Birch 还原是一种强大的合成方法,它使用溶剂化电子将惰性芳烃转化为 1,4-环己二烯有价值的中间体,以构建分子复杂性。桦木还原传统上使用溶解在氨中的碱金属来产生溶剂化电子,用于还原未活化的芳烃,例如苯(Ered < -3.42 V vs. SCE)。光氧化还原催化剂在高度还原应用中越来越受欢迎,但没有报道显示出足以减少苯的还原潜力。在这里,我们引入苯并苝酰亚胺作为新型有机光氧化还原催化剂,用于在环境温度下进行桦木还原,并由市售 LED 的可见光驱动。使用低催化剂负载量(<1 摩尔百分比),在完全无金属的反应中,苯和其他官能化芳烃以中等至良好的产率选择性地转化为 1,4-环己二烯。机理研究表明,这种前所未有的可见光诱导反应是通过有机光氧化还原催化剂利用两个可见光光子的能量影响单个高能化学转化的能力实现的。
Ruthenium Halide Complexes as
<i>N</i>
‐Alkylation Catalysts
作者:Andrea Rodríguez‐Bárzano、Joel D. A. Fonseca、A. John Blacker、Patrick C. McGowan
DOI:10.1002/ejic.201400117
日期:2014.4
[RuCl2(p-cymene)]2, in the presence of the diphosphine 1,1′-bis(diphenylphosphino)ferrocene (dppf). The best catalytic activities were obtained with ruthenium iodide compounds. The formation of either [RuX(p-cymene)(dppf)][X] or [(RuX2(p-cymene)) 2(dppf)] (X = halide) under the catalytic conditions employed was investigated.
Preparation, Reactivity and Peptide Labelling Properties of (η
<sup>6</sup>
‐Arene)ruthenium(
<scp>II</scp>
) Complexes with Pendant Carboxylate Groups
作者:Ralf Stodt、Susan Gencaslan、Iris M. Müller、William S. Sheldrick
DOI:10.1002/ejic.200200599
日期:2003.5
(η6-Arene)ruthenium(II) complexes of the type [[η6-C6H5(CH2)nCOOH]Ru(µ-Cl)Cl}2] (2a, n = 1; 3, n = 3) with tethered carboxylate groups can be obtained by dehydrogenation of the appropriate cyclohexadiene with RuCl3·3H2O. Formation of a κO-coordinated chelate in weakly acidic solution is observed by means of a 1H NMR titration for both [η6-C6H5(CH2)3COOH}Ru(aq)](OTf)2 (3a′) and [η6-C6H5(CH2)3COO
[EN] COMPLEXES AND METHODS FOR THEIR PREPARATION<br/>[FR] COMPLEXES ET LEURS PROCÉDÉS DE PRÉPARATION
申请人:JOHNSON MATTHEY PLC
公开号:WO2016042298A1
公开(公告)日:2016-03-24
The invention provides methods for the preparation of ligands for complexes, methods for preparing complexes and complexes having those ligands. Also provided is the use of a complex as a catalyst in a method of synthesis.
Disclosed are methods for the preparation of ligands for complexes, methods for preparing complexes and complexes having those ligands. Also provided is the use of a complex as a catalyst in a method of synthesis.