scholarly journals An Efficient Heterogeneous Palladium(0)-Catalysed Cross-Coupling between 1-Bromoalkynes and Terminal Alkynes Leading to Unsymmetrical 1,3-Diynes

2018 ◽  
Vol 42 (3) ◽  
pp. 133-137 ◽  
Author(s):  
Zhaotao Xu ◽  
Jinting Ai ◽  
Mingzhong Cai
Keyword(s):  
Room Temperature ◽  
Cross Coupling ◽  
Terminal Alkynes ◽  
Reaction Solution ◽  
Simple Filtration ◽  
Bidentate Phosphine ◽  
Mcm 41

An efficient heterogeneous palladium(0)-catalysed cross-coupling of 1-bromoalkynes with terminal alkynes was achieved in DMF at room temperature in the presence of 5 mol% of MCM-41-immobilised bidentate phosphine palladium(0) complex [MCM-41-2P-Pd(0)] and 2 mol% of CuI with Et3N as base, yielding a variety of unsymmetrical 1,3-diynes in moderate to good yields. This heterogeneous palladium(0) complex could be easily recovered by a simple filtration of the reaction solution and recycled at least seven times without significant decrease in activity.

Synthesis of Unsymmetrical 1,3-Diynes via Pd/Cu-Catalyzed Cross-Coupling of Terminal Alkynes at Room Temperature

2016 ◽  
Vol 34 (9) ◽  
pp. 895-900 ◽  
Author(s):  
Yashuai Liu ◽  
Ping Liu ◽  
Ningning Gu ◽  
Jianwei Xie ◽  
Yan Liu ◽  
...  
Keyword(s):  
Room Temperature ◽  
Cross Coupling ◽  
Terminal Alkynes

A highly efficient heterogeneous copper-catalysed cascade reaction of aryl iodides with acetamidine hydrochloride leading to primary arylamines

2017 ◽  
Vol 41 (6) ◽  
pp. 315-320 ◽  
Author(s):  
Xue Huang ◽  
Ruian Xiao ◽  
Chongren You ◽  
Tao Yan ◽  
Mingzhong Cai
Keyword(s):  
Copper Complex ◽  
Cascade Reaction ◽  
Highly Efficient ◽  
Aryl Iodides ◽  
Reaction Solution ◽  
Simple Filtration ◽  
Mcm 41

A highly efficient heterogeneous copper-catalysed cascade reaction of aryl iodides with acetamidine hydrochloride was achieved in DMF in the presence of 10 mol% of an MCM-41-immobilised L-proline-copper(I) complex (MCM-41-L-proline-CuI) with Cs2CO3 as base, yielding a variety of primary arylamines in good to excellent yields. The new heterogeneous copper complex can be easily prepared from commercially readily available and inexpensive reagents, recovered by a simple filtration of the reaction solution and used at least seven more times without any decrease in activity.

Visible-light-activated copper(i) catalyzed oxidative Csp–Csp cross-coupling reaction: efficient synthesis of unsymmetrical conjugated diynes without ligands and base

2016 ◽  
Vol 18 (16) ◽  
pp. 4526-4530 ◽  
Author(s):  
Arunachalam Sagadevan ◽  
Ping-Chiang Lyu ◽  
Kuo Chu Hwang
Keyword(s):  
Visible Light ◽  
Room Temperature ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Terminal Alkynes ◽  
Efficient Synthesis ◽  
Cross Coupling Reaction ◽  
Conjugated Diynes

An efficient and eco-friendly approach to Csp–Csp cross-coupling of terminal alkynes for the construction of unsymmetrical conjugated diynes via a visible-light-induced CuCl catalysed process at room temperature is described.

Addition of diaryl disulfides to terminal alkynes catalysed by an MCM-41-supported bidentate phosphine palladium(0) complex

2009 ◽  
Vol 2009 (10) ◽  
pp. 616-618 ◽  
Author(s):  
Jianying Li ◽  
Jun Liu ◽  
Mingzhong Cai
Keyword(s):  
Palladium Catalyst ◽  
Terminal Alkynes ◽  
Stereoselective Addition ◽  
Bidentate Phosphine ◽  
High Yields ◽  
Mcm 41

A variety of ( Z)-1,2-bis(arylthio)-substituted alkenes have been conveniently synthesised in high yields by the stereoselective addition of diaryl disulfides to terminal alkynes catalysed by an MCM-41-supported bidentate phosphine palladium(0) complex. This polymeric palladium catalyst can be recovered and reused many times without any loss of activity.

Efficient Heterogeneous Copper-Catalysed C–Se Coupling of Aryl Iodides with Symmetrical Diselenides towards Unsymmetrical Monoselenides

2018 ◽  
Vol 42 (11) ◽  
pp. 584-588 ◽  
Author(s):  
Ruonan Zhao ◽  
Chenyu Yan ◽  
Yuanyuan Jiang ◽  
Mingzhong Cai
Keyword(s):  
Copper Catalyst ◽  
Significant Loss ◽  
Highly Efficient ◽  
Aryl Iodides ◽  
Reaction Solution ◽  
Simple Filtration ◽  
Neutral Conditions ◽  
Mcm 41

A highly efficient heterogeneous copper(I)-catalysed C–Se coupling of aryl iodides with diaryl diselenides was achieved in dimethylformamide at 110 °C under neutral conditions by using a 10 mol% of bipyridine-functionalised MCM-41-supported copper(I) complex [bpy-MCM-41-CuI] as the catalyst and magnesium as the reductive reagent, yielding a variety of unsymmetrical diaryl selenides in good to excellent yields. This heterogeneous copper catalyst can be easily recovered by a simple filtration of the reaction solution and recycled at least seven times without significant loss of activity.

ChemInform Abstract: Synthesis of Unsymmetrical 1,3-Diynes via Pd/Cu-Catalyzed Cross-Coupling of Terminal Alkynes at Room Temperature.

ChemInform ◽  
2016 ◽  
Vol 47 (52) ◽  
Author(s):  
Yashuai Liu ◽  
Ping Liu ◽  
Ningning Gu ◽  
Jianwei Xie ◽  
Yan Liu ◽  
...  
Keyword(s):  
Room Temperature ◽  
Cross Coupling ◽  
Terminal Alkynes

The Direct Carboxylation of Terminal Alkynes with Carbon Dioxide Using Copper-Conjugated Microporous Polymer as Catalyst

2013 ◽  
Vol 634-638 ◽  
pp. 612-615 ◽  
Author(s):  
Yong Xie ◽  
Bi Feng He ◽  
Nian Yu Huang ◽  
Wei Qiao Deng
Keyword(s):  
Atmospheric Pressure ◽  
Room Temperature ◽  
Cross Coupling ◽  
Terminal Alkynes ◽  
Feasible Method ◽  
Mild Conditions ◽  
Conjugated Microporous Polymer ◽  
Microporous Polymer ◽  
Propiolic Acid ◽  
Co2 Transformation

A Cu-conjugated microporous polymer catalyst (CMP-Cu) was designed and prepared via Sonogashira-Hagihara cross-coupling of 3,8-dibromo-1,10-phenanthroline with 1,3,5-triethyny benzene in toluene. The CMP-Cu showed a catalytic activity for direct carboxylation of terminal alkynes with CO2 in the presence of K2CO3/Cs2CO3 at mild conditions. Several propiolic acids (such as 3-phenylpropiolic acid, 3-(4-nitrophenyl)propiolic acid and 4,4-dimethyl-2-pentynoic acid) have been prepared in a simple and feasible method at room temperature and atmospheric pressure. This catalyst is attractive for CO2 transformation.

Nickel (II) and oxovanadium (IV) complexes supported on MCM-41 mesoporous and their application in catalytic selective sulfide and thiol oxidation

2020 ◽  
Vol 23 ◽  
Author(s):  
Mohsen Nikoorazm ◽  
Maryam Khanmoradi ◽  
Masoumeh Sayadian
Keyword(s):  
Catalytic Activity ◽  
Room Temperature ◽  
Sol Gel ◽  
Reaction Times ◽  
Significant Loss ◽  
Spectral Studies ◽  
High Catalytic Activity ◽  
Catalytic Systems ◽  
Solvent Free Conditions ◽  
Mcm 41

Introduction:: MCM-41 was synthesized using the sol-gel method. Then two new transition metal complexes of Nickel (II) and Vanadium (IV), were synthesized by immobilization of adenine (6-aminopurine) into MCM-41 mesoporous. The compounds have been characterized by XRD, TGA, SEM, AAS and FT-IR spectral studies. Using these catalysts provided an efficient and enantioselective procedure for oxidation of sulfides to sulfoxides and oxidative coupling of thiols to their corresponding disulfides using hydrogen peroxide at room temperature. Materials and Methods:: To a solution of sulfide or thiol (1 mmol) and H2O2 (5 mmol), a determined amount of the catalyst was added. The reaction mixture was stirred at room temperature for the specific time under solvent free conditions. The progress of the reaction was monitored by TLC using n-hexane: acetone (8:2). Afterwards, the catalyst was removed from the reaction mixture by centrifugation and, then, washed with dichloromethane in order to give the pure products. Results:: All the products were obtained in excellent yields and short reaction times indicating the high activity of the synthesized catalysts. Besides, the catalysts can be recovered and reused for several runs without significant loss in their catalytic activity. Conclusion:: These catalytic systems furnish the products very quickly with excellent yields and VO-6AP-MCM-41 shows high catalytic activity compared to Ni-6AP-MCM-41.

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