Selective synthesis of unsymmetrical ethers from different alcohols catalyzed by sodium bisulfite
作者:Jun-Lai Yu、Hui Wang、Kai-Feng Zou、Jia-Rui Zhang、Xiang Gao、Dan-Wei Zhang、Zhan-Ting Li
DOI:10.1016/j.tet.2012.10.032
日期:2013.1
ethers from alcohols catalyzed by sodium bisulfite is reported. The procedure enables the direct dehydration of primary, secondary, and tertiary benzylicalcohols with aliphatic alcohols in the absence of solvent to selectively produce unsymmetrical ethers in high yields with low catalyst loading. No symmetrical ethers are generated in the reactions. The etherification of a chiral secondary benzyl alcohol
Chemoselective Formation of Unsymmetrically Substituted Ethers from Catalytic Reductive Coupling of Aldehydes and Ketones with Alcohols in Aqueous Solution
作者:Nishantha Kalutharage、Chae S. Yi
DOI:10.1021/acs.orglett.5b00553
日期:2015.4.3
A well-defined cationic Ru–H complex catalyzes reductive etherification of aldehydes and ketones with alcohols. The catalytic method employs environmentally benign water as the solvent and cheaply available molecular hydrogen as the reducing agent to afford unsymmetrical ethers in a highly chemoselective manner.
Synthesis of bimetallic Zr(Ti)-naphthalendicarboxylate MOFs and their properties as Lewis acid catalysis
作者:Antonia M. Rasero-Almansa、Marta Iglesias、Félix Sánchez
DOI:10.1039/c6ra23143h
日期:——
Bimetallic Zr(Ti)-NDC basedmetal–organicframeworks (MOFs) have been prepared by incorporation of titanium(IV) into zirconium(IV)-NDC-MOFs (UiO family). The resulting materials maintain thermal (up to 500 °C), chemical and structuralstability with respect to parent Zr-MOFs as can be deduced from XRD, N2 adsorption, FTIR and thermal analysis. The materials have been studied in Lewis acid catalyzed
Effect of the niobium state on the properties of NbSiBEA as bifunctional catalysts for gas- and liquid-phase tandem processes
作者:Pavlo I. Kyriienko、Olga V. Larina、Nataliia O. Popovych、Sergiy O. Soloviev、Yannick Millot、Stanislaw Dzwigaj
DOI:10.1016/j.molcata.2016.06.024
日期:2016.12
Nb(V) (Nb0.7SiBEA) and a mixture of framework mononuclear and extra-framework polynuclear Nb(V) (Nb2.0SiBEA) were prepared by two-step postsynthesis method as evidenced by XRD, NMR, DR UV–vis and FTIR. DR UV–vis showed that two types of framework mononuclear Nb(V) are present in Nb0.7SiBEA, while Nb2.0SiBEA mainly contained isolated mononuclear Nb(V) in the framework of zeolite and polynuclear Nb(V)
Titanium-exchanged montmorillonite (Ti4+-mont) was found to act as an efficient heterogeneous catalyst for the etherification of a wide range of alcohols under mild reaction conditions. Ti4+-mont was reusable with retention of high efficiency and applicable to scale-up reaction conditions.