N-Butylpyrrolidinone as a dipolar aprotic solvent for organic synthesis
作者:James Sherwood、Helen L. Parker、Kristof Moonen、Thomas J. Farmer、Andrew J. Hunt
DOI:10.1039/c6gc00932h
日期:——
N-Butylpyrrolidinone (NBP) has been demonstrated as a suitable safer replacement solvent for N-Methylpyrrolidinone (NMP) in selected organic syntheses.
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
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
SULFAMIC ACID CATALYZED FIVE COMPONENT REACTION FOR EFFICIENT AND ONE-POT SYNTHESIS OF DENSELY FUNCTIONALIZED TETRAHYDROPYRIDINE SCAFFOLD
作者:ANIKETP SARKATE、JAIPRAKASH N SANGSHETTI、NANASAHEB B DHARBALE、AJINKYA P SARKATE、DEVANAND B SHINDE
DOI:10.4067/s0717-97072015000100012
日期:——
acid in One-pot assembling of aromatic aldehydes, aromaticamines and β-ketoesters to afford densely functionalized tetrahydropyridines in 70-89% yield has been presented. The advantage of sulfamic acid against other catalysts in terms of yield has been studied. The effect of different solvents on reaction time and yield has also been studied. Easy work up and mild reaction condition are the advantages
Synthesis of tetrahydropyridines by one-pot multicomponent reaction using nano-sphere silica sulfuric acid
作者:Masoume Daraei、Mohammad Ali Zolfigol、Fateme Derakhshan-Panah、Morteza Shiri、Hendrik G. Kruger、Mohammad Mokhlesi
DOI:10.1007/s13738-014-0548-x
日期:2015.5
A highly efficient protocol for the synthesis of 1,2,3,4-tetrahydropyridines in the presence of nano-sphere silica sulfuric acid (NS-SSA) was used for good yields by one-potmulticomponentreaction (MCRs). The reagent nano-sphere silica sulfuric acid (NS-SSA) has several advantages, such as easy workup, nontoxicity, convenience and high yields of products.