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Bimetallic Pd-Cu/Al_(2)O_(3) Catalyst for the Green Catalytic Synthesis of 2,2'-bipyridine from Pyridine

Journal of Wuhan University of Technology(Materials Science) 2022年第6期37卷 1123-1128页

作者： WANG Lin ZHANG Yimeng WANG Guangyu FENG Yisi LI Qianwen College of Light-Textile Engineering and Art Anhui Agriculture UniversityHefei 230036China School of Chemistry and Chemical Engineering Hefei University of TechnologyHefei 230009China Wuhu Youpai Nursing Products Technology Co. LtdWuhu 241000China

Bimetallic Pd-Cu/Al_(2)O_(3) was prepared by wetness impregnation method and its catalytic activity on coupling reaction of pyridine to 2,2'-bipyridine was assessed in view of the effects of different molar ratios of Pd:*** is found that Pd-Cu/Al_(2)O_(3) has the small particle size and good dispersion through the *** with Pd/Al_(2)O_(3),Pd-Cu(1:2)/Al_(2)O_(3) is the preferable catalyst under the optimum conditions of 1 MPa N2 pressure,310℃and 16 *** conversion of pyridine is 35.4%,and the selectivity for 2,2'-Bipyridine is up to 99%,which is much higher activity than Pd/Al_(2)O_(3).The directly coupled synthesis meets the requirements of the atomic economy *** addition of Cu also reduces the dosage of Pd and lowers the *** is worth noting that the recycled Pd-Cu/Al_(2)O_(3) catalyst still shows high activity and stability after three times.

关键词： Pd-Cu/Al_(2)O_(3) X-ray diffraction atomic economy 2,2'-bipyridine catalytic activity

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1,n-Thiosulfonylation using thiosulfonates as dual functional reagents

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Chinese Chemical Letters 2022年第11期33卷 4732-4739页

作者： Danhua Ge Jia-Wei Chen Pei Xu Jinyin Pan Xue-Qiang Chu Institute of Advanced Synthesis School of Chemistry and Molecular EngineeringNanjing Tech UniversityNanjing 211816China Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy School of PharmacyXuzhou Medical UniversityXuzhou 221004China Sartorius Stedim(Shanghai)Trading Co. Ltd.Shanghai 200000China

In recent years,the direct introduction of sulfonyl and sulfenyl groups into unsaturated substrates by using thiosulfonates as unique dual functional reagents has inarguably provided chemists a new platform for the diverse synthesis of important S-containing *** 1,n-thiosulfonylation reactions usually feature simple procedures,100%atom economy,and high *** review focuses on the recent advancements in the transformations of thiosulfonates through 1,n-thiosulfonylation involving the formation of two distinct C-S bonds under transition-metal-catalyzed or metal-free conditions,where thiosulfonates act as both a sulfonyl and a sulfenyl component.

关键词： Thiosulfonylation Thiosulfonates Dual functional reagents Difunctionalization atomic economy

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