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
Multicomponent preparation of highly functionalized piperidines using magnesium hydrogen sulfate as an efficient catalyst
作者:Mohammad Reza Mohammad Shafiee、Batool Hojati Najafabadi、Majid Ghashang
DOI:10.1007/s11164-012-0878-1
日期:2013.10
Abstract A simple, highly versatile, and efficientsynthesis of functionalized piperidines is achieved by four-component cyclo-condensation of aldehydes, aromatic amines, and acetoacetic esters using magnesium hydrogensulfate [Mg(HSO4)2] as a catalyst in acetonitrile as the solvent at roomtemperature. The key advantages of this procedure are high yields, easy work-up, and purification of products
An efficient one-pot multi-component synthesis of highly functionalized piperidines
作者:Santosh V. Goswami、Prashant B. Thorat、Sudhakar R. Bhusare
DOI:10.1515/hc-2012-0105
日期:2012.12.1
Abstract A simple, inexpensive and efficientone-pot synthesis of piperidine derivatives was achieved in excellent yield via the three-component reaction of substituted aniline, 1,3-dicarbonyl compound and aromatic aldehyde using phenylboronic acid as catalyst.
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