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Facile synthesis and properties of alkali-clearable azo disperse dye containing a carboxylic ester moiety

Chinese Chemical Letters 2014年第8期25卷 1121-1124页

作者： Zhi-Hua Cui Xiao-Hong Cheng Xin Li Hong-Hui Lu Xi-Dong Wang Wei-Guo Chen Engineering Research Center for Eco-Dyeing & Finishing of Textiles Ministry of Education of China Zhejiang Sci-Tech University Key Laboratory of Advanced Textile Materials and Manufacturing Technology Ministry of Education of China Zhejiang Jihua Group Co. Ltd.

A yellow, alkali-clearable azo disperse dye containing a carboxylic ester moiety was readily synthesized from the reactant p-aminobenzoic acid by successive diazotization, coupling reaction, chlorination and esterification with ethanol. Then its molecular structure was characterized by FTIR,1H NMR,13 C NMR,mass spectrometry and elemental analysis. The synthesized dye and a similar control dye containing the acylamide moiety（I） were applied to dyeing poly（ethylene terephthalate） fabric and their washing and rubbing fastness properties with different post-treatment methods（reduction clearing and alkali clearing） were examined and compared. It is found that the ester-containing disperse dye shows good alkali-clear ability on poly（ethylene terephthalate） fabric and contaminates little to environment due to the absence of reductants, as well as low toxicity and easy recycling of the hydrolysates.

关键词： Alkali-clearable Synthesis carboxylic ester Disperse dye PET

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Construction of Multi-Substituted Benzenes via NHC-Catalyzed Reactions of carboxylic esters

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Chinese Journal of Chemistry 2018年第4期36卷 333-337页

作者： Jichang Wu Chengli Mou Yonggui Robin Chi Laboratory Breeding Base of Green Pesticide and Agricultural Bioengi- neering Key Laboratory of Green Pesticide and Agricultural Bioengi- neering Ministry of Education Guizhou University Huaxi District Gui- yang Guizhou 550025 China School of Pharmacy Guiyang College of Traditional Chinese Medicine Huaxi District Guiyang Guizhou 550025 China

A carbene-catalyzed ester activation reaction for the synthesis of multi-substituted benzenes is developed. Tetra-substituted benzene com- pounds are efficiently synthesized through this methodology. Compared with aldehyde substrates used in previous reports, the ester substrates used here are much more readily available and inexpensive. In addition, the TEMPO oxidant used here is more inexpensive than the quinones commonly used in related carbene-catalyzed reactions.

关键词： N-heterocyclic carbene carboxylic ester benzene synthesis organocatalysis TEMPO oxidation

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Studies on PNPP Hydrolysis Catalyzed by Schiff Base Cobalt（Ⅱ） Complexes

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Chinese Journal of Chemistry 2006年第11期24卷 1498-1504页

作者：胡伟李建章王莹李慈杜娟孟祥光胡常伟曾宪诚 Department of Chemistry Sichuan University Chengdu Sichuan 610064 China Department of Chemistry Sichuan University of Science & Engineering Zigong Sichuan 643000 China College of Bioengineering Chongqing Technology and Business University Chongqing 400060 China

Two cobalt（Ⅱ） complexes of the Schiff base with morpholino or aza-crown ether pendants, CoL^1 and CoL^2, as mimic hydrolytic metalloenzyme, were used in catalytic hydrolysis of carboxylic ester （PNPP）. The analysis of specific absorption spectra of the hydrolytic reaction systems indicates that key intermediates, made up of PNPP and Co（Ⅱ） complexes, have been formed in reaction processes of the PNPP catalytic hydrolysis. The mechanism of PNPP catalytic hydrolysis has been proposed based on the analytic result of specific absorption spectrum. A kinetic mathematical model, applied to the calculation of the kinetic parameter of PNPP catalytic hydrolysis, has been established based on the mechanism proposed. The acid effect of buffer solution, structural effect of the complexes, and effect of temperature on the rate of PNPP hydrolysis catalyzed by the complexes have been also discussed.

关键词： Schiff base cobalt(Ⅱ) complex mimic hydrolase catalytic kinetics carboxylic ester

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Accelerated Hydrolysis of p-Nitrophenyl Picolinate Catalyzed by Metallomicelle Made from a Novel Macrocyclic Polyamine Copper（Ⅱ） Complex

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Chinese Journal of Chemistry 2007年第6期25卷 772-777页

作者：寇兴明赵国坡黄忠田玉华孟祥光曾宪诚 Faculty of Chemistry Sichuan University Chengdu Sichuan 610064 China China Academy of Engineering Physics Mianyang Sichuan 621900 China

A copper（Ⅱ） complex 1 of a novel macrocyclic polyamine ligand with hydroxylethyl pendant groups, 4,11-bis（hydroxylethyl）-5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane （L） has been synthesized and characterized. Rate enhancement for hydrolysis of p-nitrophenyl picolinate （PNPP） catalyzed by 1 was studied kinetically under Brij35 micellar condition. For comparision, the catalytic activity of corresponding copper（Ⅱ） complex 2 of non-substituted macrocyclic polyamine ligand, 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraaza-cyclotetradecane （L＇） toward the hydrolysis of PNPP was also investigated. The results indicate that the macrocyclic polyamine copper（Ⅱ） complex 1 effectively catalyzed the hydrolysis of PNPP, and the pendant ligand hydroxyl group or deprotonated pendant ligand hydroxyl group can act as catalytically active species in the reaction. A ternary Complex kinetic model involving metal ion, ligand and substrate has been proposed, and the results confirmed the reasonability of such kinetic model.

关键词： macrocyclic polyamine copper(Ⅱ) complex carboxylic ester metallomicelle hydrolysis

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