Addition of carbon nucleophiles to cyclic N-acyliminium and oxocarbenium ions under solvent-free conditions
摘要:
The InCl3-catalyzed addition of carbon nucleophiles to cyclic N-acyliminium and oxocarbenium ions under solvent-free conditions at room temperature is described. The corresponding-substituted heterocycles were obtained in moderate to excellent yields. (c) 2006 Elsevier Ltd. All rights reserved.
The Lewis Acidic Ruthenium-Complex-Catalyzed Addition of β-Diketones to Alcohols and Styrenes Is in Fact Brønsted Acid Catalyzed
作者:Pei Nian Liu、Zhong Yuan Zhou、Chak Po Lau
DOI:10.1002/chem.200700705
日期:2007.10.15
toward 1-phenylethanol in the presence of HClO4; it also fails to catalyze the addition of acetylacetone to 1-phenylethanol. On the basis of these observations, it is proposed and confirmed by independent experiments that the catalytic addition of beta-diketones to the secondary alcohols is in fact catalyzed by the Bronsted acid HClO4, which is generated by the reaction of cis-[Ru(6,6'-Cl2bipy)2(H2O)2](ClO4)2
Efficient and recyclable solid acid-catalyzed alkylation of active methylene compound via oxonium intermediate for atom economical synthesis of organic compounds
作者:Dhanaji R. Naikwadi、Balasaheb D. Bankar、Krishnan Ravi、Ankush V. Biradar
DOI:10.1007/s11164-021-04499-3
日期:2021.9
enol ethers and aryl acetals through oxonium intermediate under solvent-free conditions using heterogeneous solid acid catalysts. Among studied solid acid catalysts, Amberlyst-15 gave excellent yields (35–85%) of alkylated products. The catalyst showed broader substrate scope, and a recyclable catalytic cost-efficient approach of the alkylation was examined on the different types of cyclic enol ethers
heterocyclic frameworks thus obtained were evaluated for their antimycobacterialactivity. The active scaffolds were further explored by a parallel library generation in order to establish SAR. Further, low cytotoxicity against A549 cell line enhances the potential of the synthesized molecules as promising antimycobacterial agents.
FeCl3-catalyzed addition of nitrogen and 1,3-dicarbonyl nucleophiles to olefins
作者:Christophe Dal Zotto、Julien Michaux、Araceli Zarate-Ruiz、Eric Gayon、David Virieux、Jean-Marc Campagne、Vincent Terrasson、Grégory Pieters、Anne Gaucher、Damien Prim
DOI:10.1016/j.jorganchem.2010.09.031
日期:2011.1
A direct intermolecular addition of nitrogen and 1,3-dicarbonyl nucleophiles to stabilized double bonds (styrenes, 1,3-dienes, enol-ethers, sugars..) in the presence of green and inexpensive FeCl3 catalyst is described. (C) 2010 Elsevier B.V. All rights reserved.
Oxonium ions in organic synthesis: condensation of 2,3-dihydrofuran and 3,4-dihydro-2H-pyran with 1,3-dicarbonyl compounds