Chiral Cadmium(II) Metal–Organic Framework from an Achiral Ligand by Spontaneous Resolution: An Efficient Heterogeneous Catalyst for the Strecker Reaction of Ketones
作者:Ashish Verma、Kapil Tomar、Parimal K. Bharadwaj
DOI:10.1021/acs.inorgchem.7b01915
日期:2017.11.20
A thermally stable cadmium-based chiral metal–organic framework (MOF), [Cd2(L)(H2O)(DMF)]·3DMF·2H2O}n (1; DMF = N,N-dimethylformamide), has been synthesized from an achiral ligand by spontaneous resolution. The MOF features 1D open channels with a large density of active metal sites and has a 3,6-c binodal net with a rare sit 3,6-conn topology. The metal-bound water and DMF solvents could be easily
A concise, straightforward and efficient method has been developed for the synthesis of α-aminonitriles by an one-pot three-component condensation of aldehydes or ketones, amines and trimethylsilyl cyanide catalyzed by MgI2 etherate under solvent-free conditions. This protocol has some advantages such as mild reaction condition, simple work-up, short reaction time and high product yields.
作者:Jaewon Choi、Hye Yun Yang、Hae Jin Kim、Seung Uk Son
DOI:10.1002/anie.201003101
日期:2010.10.11
Hollow‐sphere catalysts were prepared by means of 3D network formation between a tetraimidazolium building block and palladium acetate. The bis(N‐heterocyclic carbene)–palladiumspecies that were concomitantly formed during growth of the hollowspheres showed excellent activity as heterogeneous catalysts in one‐pot three‐component Streckerreactions of ketones (see picture; TMS=trimethylsilyl).
A Discrete Tetrahedral Indium Cage as an Efficient Heterogeneous Catalyst for the Fixation of CO<sub>2</sub> and the Strecker Reaction of Ketones
作者:Guang-Ming Liang、Peng Xiong、Khan Azam、Qing-Ling Ni、Jian-Qiang Zeng、Liu-Cheng Gui、Xiu-Jian Wang
DOI:10.1021/acs.inorgchem.9b02763
日期:2020.2.3
indium cage, [In12(μ3-OH)4(HCO2)24(tcma)4]} (In12-GL), was synthesized solvothermally by the reaction of indium nitrate with the tripodal tricarboxylic acid ligand N,N,N-tris(2'-carboxy[1,1'-biphenyl]-4-yl)methyl}methylammonium chloride ([H3tcma]+Cl). This cage consists of four trimeric units [In3(μ3-OH)(μ2-CO2)3(μ2-HCO2)3] and four [tcma]2- ligands, which all perform as 3-connection nodes to bridge
From Zn(II)-Carboxylate to Double-Walled Zn(II)-Carboxylato Phosphate MOF: Change in the Framework Topology, Capture and Conversion of CO<sub>2</sub>, and Catalysis of Strecker Reaction
作者:Mayank Gupta、Dinesh De、Kapil Tomar、Parimal K. Bharadwaj
DOI:10.1021/acs.inorgchem.7b02443
日期:2017.12.4
Interestingly, this adsorbed CO2 could be converted very efficiently to cyclic carbonates under mild conditions using 2′ as the catalyst in the presence of tetrabutylammonium bromide as the cocatalyst. The presence of open metal sites in 2′ makes it an efficient heterogeneous catalyst for solvent-free three-component Streckerreactionusing various aldehydes/ketones together with amines and trimethylsilyl
配体H 2 L是通过将咪唑部分连接至间苯二甲酸的5-位而建立的。它形成两种类型的多孔骨架,[Zn(L)]·2DMF·2H 2 O} n(1)和[(CH 3)2 NH 2 ] [Zn 2(L)(H 2 O)PO 4 ]·2DMF} n(2)。1是多孔的中性骨架,具有rtl金红石3,6-conn拓扑,而2是具有双壁六角形通道的有机金属磷酸盐阴离子多孔骨架。骨架1'(去溶剂化)表现出中等的CO 2吸附(在273 K,1 bar下为58 cc g –1),而2'(去溶剂化)显示出对CO 2的高吸附(111.7 cc g –1或22 )的微孔性质。wt%在273 K,1巴下)。有趣的是,在溴化四丁铵作为助催化剂的情况下,使用2'作为催化剂,在温和的条件下,该吸附的CO 2可以非常有效地转化为环状碳酸酯。2'中存在开放金属位点使其在室温下以高收率使用多种醛/酮以及胺和三甲基甲硅烷基氰化物进行无溶剂