88048-84-4Relevant articles and documents
A new synthesis of highly active Rh-Co alloy nanoparticles supported on N-doped porous carbon for catalytic C-Se cross-coupling and p -nitrophenol hydrogenation reactions
Annas, Dicky,Lee, Hack-Keun,Hira, Shamim Ahmed,Park, Ji Chan,Park, Kang Hyun
, p. 7959 - 7966 (2021/05/21)
Bimetallic Rh-Co nanoparticles supported on nitrogen-doped porous carbon (Rh-Co/NPC) were synthesized from metal precursors and urea through a simple thermal decomposition/reduction under a nitrogen flow. The Rh-Co/NPC nanocatalyst which contains highly dispersed alloy nanoparticles (～6 nm) showed high catalytic performance as well as good recyclability for the C-Se coupling reaction of diphenyl diselenide and aryl boronic acid and p-nitrophenol reduction.
Ruthenium-Catalyzed C–H Selenylations of Benzamides
Ma, Wenbo,Weng, Zhengyun,Fang, Xinyue,Gu, Linghui,Song, Yupin,Ackermann, Lutz
, p. 41 - 45 (2018/11/25)
A convenient and effective protocol for the ruthenium-catalyzed C–H selenylations of benzamide was achieved under mild reaction conditions. The robust ruthenium catalyst tolerated a wide range of functional groups and set the stage for the preparation for diversely decorated benzamides. The amide directing group could be transferred to carboxylic acid, aldehyde and tetrazoles. Preliminary mechanistic study indicated a base-assisted electrophilic-type substitution C–H activation event.
Palladium-Catalyzed Direct Ortho-C-H Selenylation of Benzaldehydes Using Benzidine as a Transient Directing Group
Qiao, Huihao,Sun, Bing,Yu, Qinqin,Huang, Yi-Yong,Zhou, Yirong,Zhang, Fang-Lin
supporting information, p. 6914 - 6918 (2019/09/30)
Benzidine was found to be a novel transient directing group to enable Pd-catalyzed direct selenylation of inert C(sp2)-H bonds of benzaldehydes. Diverse diarylselenides were readily constructed in high efficiency and satisfactory yields with go
NOVEL METHOD FOR PREPARING SELENYL-SUBSTITUTED AROMATIC ALDEHYDE COMPOUNDS
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Paragraph 0180-0182, (2017/07/31)
The present invention relates to a novel method for preparing selenyl-substituted aromatic aldehyde compounds. More specifically, the method comprises the step of forming selenolate nucleophile and performing nucleophilic substitution of selenyl-substitut
METHOD OF PREPARING CORE-SHELL COPPER NANOPARTICLES IMMOBILIZED ON ACTIVATED CARBON AND METHOD OF PREPARING CHALCOGENIDE COMPOUND USING NANOPARTICLES AS CATALYST
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Paragraph 0056; 0065, (2016/11/14)
Disclosed herein is a method of preparing a Cu/Cu2O core-shell copper nanoparticle catalyst having high catalytic activity from [Cu3(BTC)2] and NaBH4 via a simple chemical reduction method. Also disclosed is a method of preparing a chalcogenide compound by using the nanoparticle catalyst as a heterogeneous catalyst in a cross-coupling reaction between a chalcogenide precursor compound and a boron-containing compound. The disclosed cross-coupling reaction is performed via a simple process, and the disclosed nanoparticle catalyst is compatible with various substrates under mild reaction conditions and exhibits excellent recyclability without a reduction in catalytic activity.
Copper nanoparticles catalyzed Se(Te)-Se(Te) bond activation: A straightforward route towards unsymmetrical organochalcogenides from boronic acids
Mohan, Balaji,Yoon, Chohye,Jang, Seongwan,Park, Kang Hyun
, p. 405 - 412 (2015/03/04)
A highly porous copper metal-organic framework, [Cu3(BTC)2] (BTC=benzene-1,3,5-tricarboxylate) was synthesized and used as a precursor for the synthesis of copper nanoparticles (NPs) and characterized by several techniques, including XRD, SEM, TEM, EDX and BET measurements. The as-synthesized copper nanoparticles were immobilized onto activated charcoal (AC) by means of ultrasonication at room temperature without any pretreatment. The Cu NPs/AC was employed as a heterogeneous catalyst for the cross-coupling of diphenyl diselenide and boronic acids to form diphenyl selenides through Se-Se bond activation under ligand-, base-, and additive-free conditions. The copper NPs/AC, which combines the architecture of MOFs and the high surface area of charcoal, could be an efficient heterogeneous catalytic system that is compatible with a variety of substituents on diphenyl selenides. Its promising catalytic activity relative to that of other homogeneous systems and low catalyst loading for the synthesis of unsymmetrical diaryl selenides is an important application in the area of nanocatalysis. The Cu NPs/AC catalyst, which exhibits excellent catalytic activity and remarkable tolerance to a wide variety of substituents, led to Se sp3-, sp2-, and sp-carbon bond formation by using DMSO as a solvent and atmospheric air as oxidant. This approach can also be extended to the preparation of unsymmetrical organotelluride derivatives. Three-in-one catalyst: Copper nanoparticles on activated charcoal show excellent catalytic activity towards the synthesis of unsymmetrical chalcogenides, starting from boronic acids, in air under ligand-, base-, and additive-free conditions, and resulting in selenium sp3-, sp2-, and sp-carbon bond formation.
NOVEL METHOD FOR PREPARING SELENYL-SUBSTITUTED AROMATIC ALDEHYDE COMPOUNDS
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Paragraph 0174-0176; 0180, (2016/10/10)
A, [...] -substituted aromatic aldehydes (selenyl-substituted aromatic aldehyde) compound relates to novel manufacturing method, specifically, form (selenolate nucleophile) nucleophile [...] aromatic aldehyde-based starting material including the nucleoph
Cu(ii) anchored nitrogen-rich covalent imine network (CuII-CIN-1): An efficient and recyclable heterogeneous catalyst for the synthesis of organoselenides from aryl boronic acids in a green solvent
Roy, Susmita,Chatterjee, Tanmay,Banerjee, Biplab,Salam, Noor,Bhaumik, Asim,Islam, Sk Manirul
, p. 46075 - 46083 (2015/02/19)
A new heterogeneous copper catalyst has been synthesized by immobilizing Cu(ii) onto the surface of a nitrogen rich porous covalent imine network material CIN-1 and it was characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), EDAX, X-ray photoelectron spectroscopy (XPS), N2 adsorption-desorption, UV-vis spectroscopy, Fourier transform infrared spectroscopy (FT-IR), thermogravimetric (TGA), and EPR spectroscopic analyses. The material has been successfully used to catalyze the cross-coupling reaction between aryl boronic acids and diphenyldiselenide to synthesize unsymmetrical organoselenides. Due to its high surface area and highly accessible catalytic sites, it shows good to excellent catalytic activity for the C-Se bond forming reaction, which was evident from the high TOF of the catalyst in this reaction. The catalyst was recycled for six repetitive runs without any appreciable loss of catalytic activity suggesting its potential usefulness in C-Se bond forming reaction. This journal is
NOVEL METHOD FOR PREPARING SELENYL-SUBSTITUTED AROMATIC ALDEHYDE COMPOUNDS
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Paragraph 0096; 0097; 0098, (2014/02/15)
The present disclosure relates to a novel method for preparing selenyl-substituted aromatic aldehyde compounds by forming a selenolate nucleophile and performing a nucleophilic substitution reaction between the selenolate nucleophile and an aromatic aldeh
A general and green procedure for the synthesis of organochalcogenides by CuFe2O4 nanoparticle catalysed coupling of organoboronic acids and dichalcogenides in PEG-400
Kundu, Debasish,Mukherjee, Nirmalya,Ranu, Brindaban C.
, p. 117 - 125 (2013/04/10)
A general and efficient procedure has been developed for the synthesis of organochalcogenides (selenides and tellurides) by a simple reaction of organoboronic acids and dichalcogenides catalysed by CuFe2O 4 nanoparticles in PEG-400 without any ligand. This protocol offers the scope for access to a wide spectrum of chalcogenides including diaryl, aryl-heteroaryl, aryl-styrenyl, aryl-alkenyl, aryl-allyl, aryl-alkyl and aryl-alkynyl versions. The catalyst is magnetically separable and recyclable eight times without any loss of appreciable catalytic activity. The products are obtained in high purities after evaporation of solvent followed by filtration column chromatography. The Royal Society of Chemistry.
