Zinc metal–organic frameworks: efficient catalysts for the diastereoselective Henry reaction and transesterification
作者:Anirban Karmakar、M. Fátima C. Guedes da Silva、Armando J. L. Pombeiro
DOI:10.1039/c4dt00219a
日期:——
Three new amidoterephthalate ligands are utilized to synthesize three new zinc(ii) metal–organic frameworks which act as heterogeneous catalysts for the diastereoselective nitroaldol (Henry) and transesterification reactions.
Asymmetric Henry Reactions Catalyzed by Metal Complexes of Chiral Boron-Bridged Bisoxazoline (borabox) Ligands
作者:Aurélie Toussaint、Andreas Pfaltz
DOI:10.1002/ejoc.200800570
日期:2008.9
Metalcomplexes of boron-bridgedbisoxazolines (boraboxligands) were evaluated as catalysts for the Henryreaction. Copper(II) complexes induced high enantio- and diastereoselectivity in reactions with nitroethane and nitropropane. The amount of base added had a strong influence on the formation of the chiralcomplex and the enantioselectivity. Comparison with the corresponding dimethylmethylene-bridged
Copper(II) coordination polymers of arylhydrazone of 1H-indene-1,3(2H)-dione linked by 4,4′-bipyridineor hexamethylenetetramine: Evaluation of catalytic activity in Henry reaction
作者:Gonçalo A.O. Tiago、Kamran T. Mahmudov、M. Fátima C. Guedes da Silva、Ana P.C. Ribeiro、Fatali E. Huseynov、Luís C. Branco、Armando J.L. Pombeiro
DOI:10.1016/j.poly.2017.05.013
日期:2017.9
distorted N3O2 square-pyramid coordination environment, while in 2 it displays a distorted N2O3 trigonal bipyramid geometry. The catalytic activity of 1 and 2 was evaluated in the diastereoselective Henry reaction of nitroethane with a variety of aromatic and aliphatic aldehydes, in water and in organic solvents. β-Hydroxy nitroalkanes were obtained in high yields (up to 92%), and moderate-to-good syn/anti
The synthesis, structure, topology and catalytic application of a novel cubane-based copper(<scp>ii</scp>) metal–organic framework derived from a flexible amido tripodal acid
作者:Anirban Karmakar、Clive L. Oliver、Somnath Roy、Lars Öhrström
DOI:10.1039/c4dt03087g
日期:——
A novel chiral metal–organicframework, [Cu4(HL)2(H2O)4(MeO)4]n (1), has been successfully synthesized from a tripodal flexible ligand (2S,2′S,2′′S)-2,2′,2′′-(benzenetricarbonyltris(azanediyl))tripropanoic acid (H3L). Compound 1 was characterized by IR and X-ray powder diffraction analysis. The structure was determined by X-ray single crystal diffraction analysis revealing that 1 possesses a 3D network
Mononuclear nickel(II) complexes with arylhydrazones of acetoacetanilide and their catalytic activity in nitroaldol reaction
作者:Atash V. Gurbanov、Fatali E. Huseynov、Ghodrat Mahmoudi、Abel M. Maharramov、Fátima C. Guedes da Silva、Kamran T. Mahmudov、Armando J.L. Pombeiro
DOI:10.1016/j.ica.2017.09.037
日期:2018.1
as homogenous catalysts for the diastereoselectivenitroaldol (Henry) reaction of aliphatic and aromatic aldehydes with nitroethane in different solvents such as acetonitrile, methanol or water. Complex 1 was found to be the more efficient catalyst for the Henry reaction in aqueousmedium, providing β-nitroalcohols with good yields (67–82%) and diastereoselectivities ( syn/anti 59:41–70:30).
摘要新的单核镍(II)配合物[Ni(HL 1)(H 2 O)2(CH 3 OH)](1,NaH 2 L 1 =钠(Z)-2-(2-(1,3-二氧-1-(苯氨基)丁-2-亚甲基)肼基)苯磺酸盐)和[Ni(H 2 L 2)2(H 2 O)4] [(CH 3)2 SO)2](2,H 3 L 2 =合成(Z)-2-(2-(1,3-二氧-1-(苯基氨基)丁烷-2-亚甲基肼基)苯甲酸)并通过IR和ESI-MS光谱,元素和X-进行表征射线晶体结构分析。化合物1和2均作为脂肪族和芳香族醛与硝基乙烷在不同溶剂(例如乙腈,甲醇或水中)的非对映选择性硝基缩醛(Henry)反应的均相催化剂。发现络合物1是在水性介质中进行亨利反应的更有效的催化剂,可提供具有良好收率(67-82%)和非对映选择性的β-硝基醇(同/反59: