One-pot five-component synthesis of highly functionalized piperidines using oxalic acid dihydrate as a homogenous catalyst
作者:Seyed Sajad Sajadikhah、Malek Taher Maghsoodlou、Nourallah Hazeri、Sayyed Mostafa Habibi-Khorassani、Anthony C. Willis
DOI:10.1016/j.cclet.2012.03.008
日期:2012.5
An efficient green protocol is described for the preparation of highlyfunctionalizedpiperidines via a one-pot five-component reaction between aromatic aldehydes, anilines and β-ketoesters in the presence of oxalic acid dihydrate as catalyst in ethanol at ambient temperature. The structure as well as the relative stereochemistry of these compounds was confirmed by single X-ray crystallographic analysis
Fe(NO3)3·9H2O is used as an efficient and effective catalyst for the one‐pot three‐component synthesis of highlyfunctionalizedpiperidines from aromatic aldehydes, anilines and b–ketoesters in ethanol at ambient temperature. This procedure includes some important aspects like the easy work‐up, no need to column chromatography, simple and readily available precursors, and good to high yields.
Cerium Ammonium Nitrate-Catalyzed Multicomponent Reaction for Efficient Synthesis of Functionalized Tetrahydropyridines
作者:Hong-Juan Wang、Li-Ping Mo、Zhan-Hui Zhang
DOI:10.1021/co100055x
日期:2011.3.14
A highly atom-economic one-pot synthesis of functionalized tetrahydropyridines by a multicomponent condensation reaction of β-ketoester, two equivalents of aromatic aldehyde, and two equivalents of amine in the presence of a catalytic amount of cerium ammonium nitrate (CAN) is reported. In this way, a series of pharmacologically interesting substituted piperidine derivatives were obtained in moderate
1-Methyl-2-oxopyrrolidinium hydrogen sulfate ([Hpyro][HSO4]) is used as an ionic liquid catalyst for the one-potthree-componentsynthesis of highly substituted piperidines from aromatic aldehydes, anilines and β–ketoesters in refluxing ethanol. This homogeneous catalyst procedure has the advantages of easy work-up, no need for column chromatography, simple and readily available precursors, and good
Organocatalyzed highly atom economic one pot synthesis of tetrahydropyridines as antimalarials
作者:Mridul Misra、Swaroop Kumar Pandey、Vivek Parashar Pandey、Jyoti Pandey、Renu Tripathi、Rama Pati Tripathi
DOI:10.1016/j.bmc.2008.11.062
日期:2009.1
A highly atom economic one pot synthesis of tetrahydropyridines was achieved by L-proline/TFA catalysed multicomponent reaction of beta-keto-esters, aromatic aldehydes and anilines. The synthesized compounds were screened against Plasmodium falciparum in vitro and one of them showed antimalarial activity with MIC as low as 0.09 mu g/mL. (C) 2008 Elsevier Ltd. All rights reserved.