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Preparation of Ionic Liquids and Their Application in Hydrogenation of aromatic nitriles

有机化学 2004年第Z1期24卷 252-页

作者： LIN,Qi CHEN,Li XIE,Yi-Peng ZHENG,Hong-Jie LI,Xian-Jun CHEN,Hua Key Labortory of Green Chemistry and Technology Ministry of Education Institute of Homogeneous Catalysis College of Chemistry Sichuan University Chengdu 610064 Department of Chemistry Minjiang University Fuzhou 350011 Key Labortory of Green Chemistry and Technology Ministry of Education Institute of Homogeneous Catalysis College of Chemistry Sichuan University Chengdu 610064 Key Labortory of Green Chemistry and Technology Ministry of Education Institute of Homogeneous Catalysis College of Chemistry Sichuan University Chengdu 610064 Key Labortory of Green Chemistry and Technology Ministry of Education Institute of Homogeneous Catalysis College of Chemistry Sichuan University Chengdu 610064 Key Labortory of Green Chemistry and Technology Ministry of Education Institute of Homogeneous Catalysis College of Chemistry Sichuan University Chengdu 610064 Key Labortory of Green Chemistry and Technology Ministry of Education Institute of Homogeneous Catalysis College of Chemistry Sichuan University Chengdu 610064

　　On the basis of their characteristic polar nature, phase behavior and lack of vapour pressure, ionic liquids are considered as green solvents and have attracted significant attention as an alternative reaction medium for homogeneous catalysis.[1] However, the "greenness" of typical ionic liquids used in the literature consisted of halogen-containing anions (such as [AlCl4]-, [BF4]- and [PF6]-) was limited in some sense, due to the serious environment concerns if the hydrolysis stability of the anion is poor (e.g. for [AlCl4]-and [PF6]-) or thermal stability of used ionic liquid is undesired. In both cases, the additional effort is needed to avoid the liberation of toxic and corrosive HF or HCl into the environment.……

关键词： aromatic nitriles ionic liquids homogeneous catalysis thermal stability vapour pressure reaction medium green solvents used in

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Ammoxidation of Substituted Toluenes on Silica-Supported VPO Catalysts

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Wuhan University Journal of Natural Sciences 2002年第3期7卷 356-360页

作者： Xie Guang\|yong, Zheng Qiong , Huang Chi, Li Xiao\|yun, Yu Peng, Chen Yuan\|yin College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, China College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 Hubei China

The ammoxidation of substituted toluenes to their corresponding nitriles over silica-supported vanadium phosphorus oxide (VPO/SiO2) catalysts has been studied. the effects of carrier silica, the addition of phosphorus, the substituents and the loadings have been discussed. Compared with unsupported VPO, the VPO/SiO2 catalysts have higher catalytic activity for ammoxidation of substituted toluenes and much lower reaction temperature. XRD shows that vanadium phosphorus oxides exist as amorphous phase and disperse to a high degree on the silica surface in 10%loading catalyst. When the loadings are over 10%, the crystalline α-VOPO4 would emerge, which would decrease the yield and selectivity. Additional phosphorus can form composite oxides with vanadia and play concerted catalytic function, which increase the selectivity of nitriles remarkably. Different substituents or same substituents on different positions have different influences because of the variant electronic stability of intermediates, the hindered accessibility of methyl group or the chemisorption state of the substrate molecule on the electrophilic catalyst surface.

关键词： ammoxidation VPO/SiO2 catalyst substituted toluenes aromatic nitriles

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Manganese-Catalyzed C-H Cyanation of Arenes with N-Cyano-N-(4-methoxy)phenyl-p-toluenesulfonamide

Manganese-Catalyzed C-H Cyanation of Arenes with N-Cyano-N-(...

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中国化学会·第十六届全国有机合成化学学术研讨会

作者： Jingjing Tang 于晓强 Ming Bao State Key Laboratory of Fine Chemicals Dalian University of Technology 大连理工大学

Aryl nitriles are important structural motifs present in various therapeutically significant natural products and marketed drugs. Moreover,nitriles can be easily transformed to a series of functional molecules,such as benzoic acid derivatives,aldehydes,amines,and ***,the development of convenient and efficient methods for the synthesis of aryl nitriles has attracted considerable *** group reported the manganese-catalyzed C-H cyanation reactions of some heterocycles including indoles,pyrroles,and thiophenes with ***,the manganese-catalyzed C-H cyanation reaction of arenes remains a *** our work,we developed a convenient and efficient method for the synthesis of aromatic nitriles through manganese-catalyzed C-H cyanation reactions of arenas with N-cyano-N-(4-methoxy);*** optimized C-H cyanation reaction was highly functional-group-tolerant,simple for synthetically useful aromatic nitriles with ample scope,and with mild reaction conditions.

关键词： arenes aromatic nitriles C-H activation cyanation manganese

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