Iron-Catalysed Markovnikov Hydrothiolation of Styrenes
作者:Jose R. Cabrero-Antonino、Antonio Leyva-Pérez、Avelino Corma
DOI:10.1002/adsc.201100731
日期:2012.3
The bis(triflimide)iron(III) salt catalyzes the hydrothiolation of styrenes in a Markovnikov fashion with good selectivities and high yields. After isolation, different benzylic thioethers are obtained. This iron(III) catalyst is unique in terms of regioselectivity and represents a sustainable and economic alternative to those processes based on stoichiometric reagents.
Bimetallic nanosized solids with acid and redox properties for catalytic activation of C–C and C–H bonds
作者:Jose R. Cabrero-Antonino、María Tejeda-Serrano、Manuel Quesada、Jose A. Vidal-Moya、Antonio Leyva-Pérez、Avelino Corma
DOI:10.1039/c6sc03335k
日期:——
A new approach is presented to form self-supported bimetallic nanosized solids with acid and redox catalyticproperties. They are water-, air- and H2-stable, and are able to activate demanding C–C and C–H reactions. A detailed mechanistic study on the formation of the Ag–Fe bimetallic system shows that a rapid redox-coupled sequence between Ag+, O2 (air) and Fe2+ occurs, giving monodisperse Ag nanoparticles
提出了一种形成具有酸和氧化还原催化特性的自支撑双金属纳米固体的新方法。它们对水、空气和 H 2稳定,并且能够激活要求苛刻的 C–C 和 C–H 反应。对 Ag-Fe 双金属体系形成的详细机理研究表明,Ag +、O 2(空气)和 Fe 2+之间发生快速氧化还原耦合序列,产生由 O 桥联双原子 Fe 3+支撑的单分散 Ag 纳米粒子三氟甲酰亚胺。该系统可以扩展到嵌入 Cu 2+、Bi 3+和 Yb 3+三氟甲酰亚胺基质中的银纳米颗粒。
cobalt-catalyzed hetero-biaryl couplingreaction between aryl chlorides and arylmagnesium halides with unprecedented selectivity has been developed. The protocol utilizes 1 mol% of cheap Co(acac)3 as pre-catalyst and effects clean reactions of deactivated chlorostyrenes with only 1.1 equiv. of the Grignard reagent under mild conditions (30 °C, 5–30 min). Highly chemoselective reactions were realized even in
A new type of carbonylation of styrenes was achieved under a 1:1 mixture of CO (0.5 atm) and O2 (0.5 atm) in the presence of Pd(OAc)2 combined with H5PMo10V2O40·nH2O to give 4-methyl-2-phenylnaphthalen-1(4H)-one in 78% yield. Various substituted styrenes were also carbonylated to the corresponding substituted arylnaphthalen-1(4H)-ones in moderate yields. The reaction was found to proceed in two stages involving the head-to-tail dimerization of styrenes, followed by carbonylation of the resulting dimers. Styrenes were efficiently dimerized under air (1 atm) in the absence of CO even at room temperature to produce head-to-tail dimers in good yields.
Iron(III) Triflimide as a Catalytic Substitute for Gold(I) in Hydroaddition Reactions to Unsaturated Carbon-Carbon Bonds
作者:Jose R. Cabrero-Antonino、Antonio Leyva-Pérez、Avelino Corma
DOI:10.1002/chem.201300386
日期:2013.6.24
In this work it is shown that iron(III) and gold(I) triflimide efficiently catalyze the hydroaddition of a wide array of nucleophiles including water, alcohols, thiols, amines, alkynes, and alkenes to multiple CC bonds. The study of the catalytic activity and selectivity of iron(III), gold(I), and Brønsted triflimides has unveiled that iron(III) triflimide [Fe(NTf2)3] is a robust catalyst under heating
在这项工作中表明,三氟甲磺酸铁(III)和金(I)可有效催化多种亲核试剂(包括水,醇,硫醇,胺,炔烃和烯烃)加氢成多个CC键。铁(III),金(I)和布朗斯台德三氟甲酸酯的催化活性和选择性的研究表明,三氟甲铁(III)[Fe(NTf 2)3 ]在加热条件下是一种坚固的催化剂,而金(I) )甚至由PPh 3稳定的三氟甲酰亚胺在80°C时容易分解并释放出三氟乙二酸(HNTf 2),该三氟乙二酸可催化相应的反应,如原位19 F,15 N和311 H NMR光谱。此处给出的结果表明,两种催化剂类型均具有弱点和优势,并且彼此互补。三氟化铁(III)可以替代三氟化金(I),作为不饱和碳-碳键加氢反应的催化剂。