PHOSPHINE FREE COBALT BASED CATALYST, PROCESS FOR PREPARATION AND USE THEREOF
申请人:COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH
公开号:US20200384451A1
公开(公告)日:2020-12-10
The present invention discloses a phosphine free cobalt based catalyst of formula (I) and a process for preparation thereof. The present invention further discloses a process for the synthesis of aromatic heterocyclic compounds of formula (II) and pyrazine derivative using the phosphine free cobalt based catalyst of formula (I).
CATALYTIC HYDROGENATION PROCESS FOR THE SYNTHESIS OF TERMINAL DIOLS FROM TERMINAL DIALKYL ALIPHATIC ESTERS
申请人:Council of Scientific & Industrial Research
公开号:US20170349514A1
公开(公告)日:2017-12-07
A phosphorus ligand-free, mild, efficient and complete catalytic hydrogenation process is for the sustainable production of terminal diols from renewable terminal dialkyl esters with improved yield. Soluble, phosphorus ligand free Ru (II)-pincer type complexes can be used as catalysts in the hydrogenation process.
Synthesis, characterization and biological evaluation of new manganese metal carbonyl compounds that contain sulfur and selenium ligands as a promising new class of CORMs
作者:André L. Amorim、Marcos M. Peterle、Ana Guerreiro、Daniel F. Coimbra、Renata S. Heying、Giovani F. Caramori、Antonio L. Braga、Adailton J. Bortoluzzi、Ademir Neves、Gonçalo J. L. Bernardes、Rosely A. Peralta
DOI:10.1039/c9dt00616h
日期:——
Three new manganese carbonyl compounds with heavy atom donors were synthesized and their potential use as photoCORMS was evaluated. Interestingly, all compounds had an elusive binding mode, in which the ligands adopted a κ2-X coordination (where X = S or Se), confirmed both by X-ray crystallography and IR spectroscopy. The stability of the title compounds in the dark was determined by monitoring the
合成了三种具有重原子供体的新型锰羰基化合物,并评估了它们作为 photoCORMS 的潜在用途。有趣的是,所有化合物都具有难以捉摸的结合模式,其中配体采用 κ 2-X 配位(其中 X = S 或 Se),由 X 射线晶体学和红外光谱证实。标题化合物在黑暗中的稳定性通过监测化合物在二氯甲烷和乙腈中的紫外光谱变化来确定。这些研究表明,在配位溶剂中,通过溶剂分子与金属中心键合的溴化物发生了交换,紫外和红外光谱的变化以及 DFT 分析证明了这一点。进行 EDA 和自然键序分析以评估重原子供体在化合物第一配位球中的影响。380 nm 处的光激发表明所有化合物都释放了所有三种 CO,如红外光谱检测到的光产物所示。此外,
SNS-Ligands for Ru-Catalyzed Homogeneous Hydrogenation and Dehydrogenation Reactions
literature-known and novel S-containing pincer-type ligands for ruthenium-catalyzed homogeneous hydrogenation and dehydrogenation reactions was carried out. The scope and limitations of these catalysts were carefully investigated, and it was shown that simple bench-stable SNS–Ru complexes can be used to facilitate the hydrogenation of a variety of different substrates at a maximum H2 pressure of 20 bar under operationally
Palladium(ii)-(E,N,E) pincer ligand (E = S/Se/Te) complex catalyzed Suzuki coupling reactions in water via in situ generated palladium quantum dots
作者:Satyendra Kumar、Gyandshwar K. Rao、Arun Kumar、Mahabir P. Singh、Ajai Kumar Singh
DOI:10.1039/c3dt51658j
日期:——
Suzuki–Miyaura coupling (SMC) of various aryl bromides with phenylboronic and 4-formyl/acetyl phenylboronic acid in water using 2–3 mol% of each of the complexes 1–3 have been found good. Complexes 1 and 2 show better catalytic activity than 3, as higher yields were observed with them in a relatively short time. The couplingreactions appear to be catalyzed with Pd(0) nanoparticles (NPs) generated
(E,N,E)钳位配体(ArECH 2 CH 2)2 NH(L1 / L2:Ar = Ph,E = S / Se; L3:Ar = CH 3 O- p -C 6 H 4,E = TE)由PHS的反应合成- / PHSE - / CH 3 O- p -C 6 H ^ 4碲-与双(2-氯乙基)胺用Na反应2的PdCl 4在含水乙醇,从而导致近正方形的平面反磁性配合物[ Pd(L)Cl] Cl(1-3),其中L = L1-L3。所有配体(L1-3)和它们的配合物(1-3)均已通过1 H,13 C 1 H},77 Se 1 H}和125 Te 1 H} NMR光谱和高分辨率质谱进行了表征。2和3的单晶结构(由X射线衍射确定)已解决(Pd–Se:2.4104(5)/2.4222(6)Å; Pd–Te:2.560(2)/2.588(2)Å)。已发现水中的各种芳基溴与苯硼酸和4-甲酰基/乙酰