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1.
Heterocyclic skeleton building blocks to afford dihydropyrimidinones and dihydropyridines based on neat adducts of diketene,alcohols and aldehydes via silica sulfuric acid(SSA) catalyzed ring opening of diketene in four-component Biginelli-type and Hantzsch-type reactions are presented. 相似文献
2.
Abdolali Alizadeh Sadegh Rostamnia Qasem Oskueyan 《Phosphorus, sulfur, and silicon and the related elements》2013,188(7):1779-1784
Heterocyclic systems 4,5-dihydrothiazol-2-ylamine derivatives are synthesized via an intramolecular thioiminoformamide annulation reaction. 相似文献
3.
The system, Pd(OAc)2/imidazolium salts (L2), was found as an efficient catalyst in the Heck coupling reaction of olefins with aryl halides and Suzuki reactions of various aryl halides with aryl boronic acids under aerobic condition. This catalytic system demonstrates great tolerance to a wide range of groups on all substrates of aryl halides, alkenes and aryl boronic acids. 相似文献
4.
Sadegh Rostamnia 《Comptes Rendus Chimie》2013,16(11):1042-1046
EtOAc-dispersed magnetic nanoparticles (DMNPs) of γ-Fe2O3 represent a straightforward and green catalyst for the rapid three-component synthesis of 5-oxo-2-thioxo-3-thiophenecarboxylate derivatives as rhodanine skeletons via a single-pot domino process. The rhodanines were prepared over magnetic nanoparticles of γ-Fe2O3 without any salt or additives. Dispersed nano-γ-Fe2O3 have many advantages, such as stability in air, reusability, reactions with high efficiency, simple separation with magnetic external field from mixture reactions, chemical stability, and also low toxicity. 相似文献
5.
Dr. Esmail Doustkhah Prof. Dr. Jianjian Lin Prof. Dr. Sadegh Rostamnia Prof. Dr. Christophe Len Prof. Dr. Rafael Luque Prof. Dr. Xiliang Luo Prof. Dr. Yoshio Bando Prof. Dr. Kevin C.-W. Wu Dr. Jeonghun Kim Prof. Dr. Yusuke Yamauchi Dr. Yusuke Ide 《Chemistry (Weinheim an der Bergstrasse, Germany)》2019,25(7):1614-1635
Sulfonic acid based mesostructures (SAMs) have been developed in recent years and have important catalytic applications. The primary applications of these materials are in various organic synthesis reactions, such as multicomponent reactions, carbon–carbon bond couplings, protection reactions, and Fries and Beckman rearrangements. This review aims to provide an overview of the recent developments in the field of SAMs with a particular emphasis on the reaction scope and advantages of heterogeneous solid acid catalysts. 相似文献
6.
The channels of mesoporous (SBA-15) represent a straightforward reactor for the rapid synthesis of indazolophthalazinetrione skeletons via three-component coupling reactions in 2,2,2-trifluoroethanol. The solid SBA-15 and TFE could be recovered and reused. The present method carries the advantage of being performed under neutral conditions and requires no activation or modification of the substrates. 相似文献
7.
We designed and synthesized a novel catalyst consisting of ordered mesoporous silica (SBA-15) functionalized with bis(thiourea) (BTU) linker. The regular and unique pore channels of BTU-SBA-15 ensure proper control of the size and homogeneous distribution of palladium nanoparticles. The physiochemical properties of the hybrid Pd@BTU-SBA-15 pre-catalyst were investigated using various techniques. The proposed catalyst is found to be very active, reusable, stable and scalable, and has excellent reactivity and selectivity for Suzuki and Heck coupling reactions under very mild and sustainable reaction conditions. 相似文献
8.
Basic isoreticular metal–organic framework (IRMOF‐3) porous nanomaterial as a suitable and green catalyst for selective unsymmetrical Hantzsch coupling reaction 下载免费PDF全文
A catalytic amount of the basic metal–organic framework (IRMOF‐3) with organic substrates was found to be an efficient, selective and waste‐free green approach for the unsymmetrical Hantzsch coupling reaction. The catalyst can be isolated from the reaction mixture and reused at least four times. Copyright © 2014 John Wiley & Sons, Ltd. 相似文献
9.
Synthesis and catalytic study of open metal site metal–organic frameworks of Cu3(BTC)2 microbelts in selective organic sulfide oxidation 下载免费PDF全文
The synthesis of open metal site metal–organic frameworks of Cu3(BTC)2 with microbelt morphology and a study of the catalytic oxidation of organic sulfides are reported. This CuBTC was found to be an efficient, selective and waste‐free green heterogeneous co‐catalyst for the green H2O2 catalytic oxidation of sulfides. The catalyst can be isolated from the reaction mixture and reused at least five times. Copyright © 2016 John Wiley & Sons, Ltd. 相似文献
10.
β-Cyclodextrin (β-CD) supramolecule was found to be a convenient, green and economical tool in one-pot synthesis of rhodanine scaffolds as a highly efficient mediating agent in aqueous media in which the reaction accelerated to complete in 15 min and room temperature. In this work, amines reacted with equimolar ratio of CS2 (not excess ratio of CS2) and then with activated acetylenes in the presence of β-CD in aqueous media. 相似文献