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.
Efficient Asymmetric Copper(I)-Catalyzed Henry Reaction Using Chiral N-Alkyl-C1-tetrahydro-1,1′-bisisoquinolines
作者:Yao Qiong ji、Gao Qi、Zaher M. A. Judeh
DOI:10.1002/ejoc.201100579
日期:2011.7.14
closely related chiral N-alkyl-C1-tetrahydro-1,1′-bisisoquinoline ligands only differing in the steric bulk of the alkyl groups has been examined in the asymmetricHenry reaction. A complex derived from the (R)-N-methyl-1′,2′,3′,4′-tetrahydro-1,1′-bisisoquinoline and copper(I) chloride proved to be a very efficient catalyst system that can promote the reaction of a wide range of aromatic and aliphatic
A new type of L-Tertiary leucine-derived ligand: Synthesis and application in Cu(II)-catalyzed asymmetric Henry reactions
作者:Zedong Cai、Ting Lan、Pengfei Ma、Jingfang Zhang、Qingqing Yang、Wei He
DOI:10.1016/j.tet.2019.130469
日期:2019.8
of Schiff bases derivedfrom amino acids were developed as chiral ligands for Cu(II)-catalyzed asymmetric Henryreactions. The optimum ligand 7d exhibited outstanding catalytic efficiency in the Cu(II)-catalyzed asymmetric Henry additions of four nitroalkanes to different kinds of aldehydes to produce 76 desired adducts in high yields (up to 96%) with excellent enantioselectivities, up to 99% enantiomeric
An efficient method for the synthesis of β-nitro alcohols from nitro alkanes and aldehydes in aqueous phosphate buffer under neutral pH conditions at room temperature is reported. In the case of higher nitro alkanes, the reaction showed very good diastereoselectivity to give syn β-nitro alcohols in preference to their anti products.
Lanthanide derivatives comprising arylhydrazones of β-diketones: cooperative E/Z isomerization and catalytic activity in nitroaldol reaction
作者:Kamran T. Mahmudov、M. Fátima C. Guedes da Silva、Manas Sutradhar、Maximilian N. Kopylovich、Fatali E. Huseynov、Nazim T. Shamilov、Anna A. Voronina、Tatyana M. Buslaeva、Armando J. L. Pombeiro
DOI:10.1039/c4dt03788j
日期:——
analysis, IR, 1H and 13C NMR spectroscopy, ESI-MS and single-crystal X-ray diffraction. Cooperative E,Z→E isomerization of KH2L2, induced by resonance assisted hydrogen bonding and ionic interactions, occurs upon the interaction with Sm(III). Catalytic activities of KH2L1,2 and their lanthanide derivatives were evaluated in the Henry reaction of nitroethane with a variety of aromatic and aliphatic aldehydes
两个配合物[KLa(HL 1)2 (CH 3)2 NCHO} 2(H 2 O)3 ](1)和[Sm(H 2 O)9 ](E -H 2 L 2)3 ·2H 2 O(2)是通过硝酸镧(III)和硝酸2-(III)与3-(2-(2,4-dioxopentan-3-yylne)hydrazinyl)-2-hydroxy-5-nitrobenzenesulfonate(KH)的反应合成的2 L 1)和钾(E,Z)-5-氯-3-(2-(1,3-二氧杂-1-苯基丁烷-2-亚甲基)肼基)-2-羟基苯磺酸盐(KH 2 L 2)。两种配合物均通过元素分析,IR,1 H和13 C NMR光谱,ESI-MS和单晶X射线衍射进行了全面表征。与Sm(III)相互作用时,由共振辅助氢键和离子相互作用引起的KH 2 L 2的E,Z → E的协作E异构化。KH 2 L 1,2的催化活性在硝基乙烷与各种芳香族和脂肪族醛的亨