Jiangsu Provincial Key Laboratory of Coast Wetland Bioresources and Environment Protection

Yancheng, China

Jiangsu Provincial Key Laboratory of Coast Wetland Bioresources and Environment Protection

Yancheng, China
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Yang J.,Yancheng Teachers University | Zhu T.,Jiangsu Provincial Key Laboratory of Coast Wetland Bioresources and Environment Protection | Wang P.,Yancheng Teachers University | Fang D.,Yancheng Teachers University
Monatshefte fur Chemie | Year: 2013

A clean procedure for the synthesis of tetrahydrobenzo[ c]xanthenes was established in the presence of a functional ionic liquid, 1-butyl-(4- dimethylamino)pyridinium hydroxide [BDMAP][OH]. The reaction was carried out via the one-pot multi-component condensation of aromatic aldehydes, cyclic 1,3-dicarbonyl compounds, and α-naphthol in aqueous media, to afford good to excellent yields ranging from 80 to 85 % within 60-90 min. After the reaction, the catalyst could be recycled and reused several times without a noticeable reduction in catalytic activity. © Springer-Verlag Wien 2013.


Peng H.,Yancheng Normal University | Sun S.,Yancheng Normal University | Hu Y.,Yancheng Normal University | Xing R.,Yancheng Normal University | And 2 more authors.
Heteroatom Chemistry | Year: 2015

A sulfated choline-based ionic liquid [Ch-OSO3H] was prepared and used as a novel catalyst for the synthesis of α-aminophosphonates via a one-pot three-component reaction with aldehydes, amines, and triethyl phosphite/diethyl phosphite at room temperature under solvent-free conditions or in aqueous media. The reaction was completed in short times and products could be simply separated from the reaction mixture in good to excellent yields. The catalyst could be recycled and reused for several times without noticeably reducing catalytic activity. © 2014 Wiley Periodicals, Inc.


Fang D.,Jiangsu Provincial Key Laboratory of Coast Wetland Bioresources and Environment Protection | Fang D.,Yancheng Normal University | Yang J.-M.,Jiangsu Provincial Key Laboratory of Coast Wetland Bioresources and Environment Protection | Liu Z.-L.,Yancheng Normal University
Journal of Heterocyclic Chemistry | Year: 2011

A biodegradable functionalized ionic liquid 3-(N,N-dimethyldodecylammonium) propanesulfonic acid hydrogen sulfate ([DDPA][HSO4]) was prepared and used as a Brønsted acid-surfactant-combined catalyst for the eco-friendly one-pot synthesis of 1,8-dioxo-octahydroxanthenes at 100°C in water. Under these conditions, the reaction of various aromatic aldehydes with dimedone generated 1,8-dioxo-octahydroxanthenes in good yields with a simple postreaction procedure. The products could simply be separated from the catalyst/water system, and the catalyst could be reused at least six times without noticeably decreasing the catalytic activity. © 2010 HeteroCorporation.


Fang D.,Jiangsu Provincial Key Laboratory of Coast Wetland Bioresources and Environment Protection | Fang D.,Jiangsu University | Wang M.,Jiangsu University | Zhong D.,Jiangsu University | Li L.,Jiangsu University
Speciality Petrochemicals | Year: 2010

The new method of catalytic esterification reaction for acetic acid and propanoic acid with ethanol, and isopropanol with butyl alcohol in acid functionalized ionic liquid 1-methyl-3-n-propyl sulfonic acid imidazolium hydrogen sulfate ([mimps][HSO 4]) was investigated. The effects of reaction temperature, reaction time, and molar ratio of the reactants on the esterification were explored. Under the optimal reaction conditions, the yields of ethyl acetate, isopropyl acetate, butyl acetate, ethyl propionate, and butyl propionate were 82%, 86%, 87%, 72%, 83%, respectively, and the selectivi-ties were all above 99%. The products were immiscible with [mimps][HSO 4] and could be separated simply by decantation after the reaction. As an environmental benign dual solvent-catalyst, the [mimps][HSO 4] could be reused for 10 times without noticeable lowering of activity.


Yang J.,Yancheng Normal University | Jiang C.,Jiangsu Provincial Key Laboratory of Coast Wetland Bioresources and Environment Protection | Qian C.,Jiangsu Provincial Key Laboratory of Coast Wetland Bioresources and Environment Protection | Fang D.,Jiangsu Provincial Key Laboratory of Coast Wetland Bioresources and Environment Protection
Green Chemistry Letters and Reviews | Year: 2013

A clean and efficient procedure was established to synthesize 1,4-dihydropyridines via one-pot Hantzsch reactions in aqueous medium without the use of a catalyst and/or organic solvent. The reaction with stoichiometric molar ration could be carried out in a sealed vessel with a water steam, air, or nitrogen atmosphere to afford Hantzsch esters in good to excellent yields and purities. After the simple filtration, the 1,4-dihydropyridines were isolated, and the filtrate could be recycled and reused without significantly decreasing the yields and purities. The novel and clean methodology offers the advantages including short reaction time, good yields, operational simplicity, less leaks, and environmentally benign. © 2013 Copyright Jinming Yang, Chenning Jiang, Jiaojiao Yang, Cunwei Qian and Dong Fang Published by Taylor & Francis.


Fang D.,Jiangsu Provincial Key Laboratory of Coast Wetland Bioresources and Environment Protection | Fang D.,Yancheng Normal University | Yang J.,Yancheng Normal University | Jiao C.,Jiangsu Provincial Key Laboratory of Coast Wetland Bioresources and Environment Protection | Jiao C.,Yancheng Normal University
Catalysis Science and Technology | Year: 2011

A novel recyclable temperature-dependant phase-separation catalytic system comprised of PEG1000-based functional dicationic acidic ionic liquid and propylene glycol monomethyl ether was developed. This catalytic system could be used for the synthesis of 2,4,5-trisubstituted imidazoles via one-pot three-component condensation with various aldehydes, benzil and ammonium acetate in reasonable to good yield of 81-95%. The reaction was accomplished homogeneously at 70°C, while the products was separated from the catalyst system by liquid/liquid phasic-separation at room-temperature, and the catalyst could be reused at least eight times without significantly decreasing the catalytic activity. © 2011 The Royal Society of Chemistry.


Fang D.,Jiangsu Provincial Key Laboratory of Coast Wetland Bioresources and Environment Protection | Yang J.-M.,Jiangsu Provincial Key Laboratory of Coast Wetland Bioresources and Environment Protection | Zhang H.-B.,Jiangsu Provincial Key Laboratory of Coast Wetland Bioresources and Environment Protection | Jiao C.-M.,Jiangsu Provincial Key Laboratory of Coast Wetland Bioresources and Environment Protection
Journal of Industrial and Engineering Chemistry | Year: 2011

A recyclable temperature-dependant phase-separation catalytic system comprised of PEG1000-based functional dicationic acidic ionic liquid and ethylene glycol monomethyl ether was used to prepare polyfunctionalized 4H-pyrans via one-pot three-component condensation with yields of 81-93%. The reaction was accomplished homogeneously at 90°C, while the products was separated from the catalyst system by liquid/liquid phasic-separation at room-temperature, and the catalyst could be reused at least eight times without noticeably decreasing the catalytic activity. © 2011 The Korean Society of Industrial and Engineering Chemistry.


Fang D.,Jiangsu Provincial Key Laboratory of Coast Wetland Bioresources and Environment Protection | Yang J.,Jiangsu Provincial Key Laboratory of Coast Wetland Bioresources and Environment Protection | Jiao C.,Jiangsu Provincial Key Laboratory of Coast Wetland Bioresources and Environment Protection
ACS Catalysis | Year: 2011

Some dicationic ionic liquids, N,N,N′,N′-tetramethyl-N, N′-dipropanesulfonic acid ethylenediammonium hydrogen sulfate, N,N,N′,N′-tetramethyl-N,N′-dipropanesulfonic acid 1,3-propanediammonium hydrogen sulfate, N,N,N′,N′-tetramethyl-N, N′-dipropanesulfonic acid 1,6-hexanediammonium hydrogen sulfate, were prepared. These ionic liquids could be used as efficient and recyclable catalysts for the synthesis of biodiesel from free long-chain fatty acids or their mixtures with low-molecular-weight alcohols as substrates. the reaction was accomplished in a monophase at 70 °C for 6 h, while the products was separated from the catalyst system by liquid/liquid biphase separation at room temperature with good yields of 93-96%. The post processing was simple, and after removal of water, the catalysts could be reused at least six times and the decrease in the yield was 3%. The novel and clean procedure offers advantages including short reaction time, good yield, operational simplicity, and environmentally benign characteristics. © 2010 American Chemical Society.


Fang D.,Jiangsu Provincial Key Laboratory of Coast Wetland Bioresources and Environment Protection | Fang D.,Yancheng Normal University | Cao Y.,Yancheng Normal University | Yang J.,Yancheng Normal University
Phosphorus, Sulfur and Silicon and the Related Elements | Year: 2013

A biodegradable SO3H-functionalized ionic liquid (IL) was prepared and used as the catalyst for a one-pot, three-component condensation synthesis of α-aminophosphonates from aldehydes, amines, and triethylphosphite/diethylphosphite at room temperature under solvent-free conditions or in aqueous media. The products could be simply separated from the reaction mixture and the catalyst could be recycled and reused for several times without noticeably reducing catalytic activity. © 2013 Taylor & Francis Group, LLC.


Fang D.,Jiangsu Provincial Key Laboratory of Coast Wetland Bioresources and Environment Protection | Zhang H.-B.,Jiangsu Provincial Key Laboratory of Coast Wetland Bioresources and Environment Protection | Liu Z.-L.,Nanjing University of Science and Technology
Journal of Heterocyclic Chemistry | Year: 2010

(Chemical Equation Presented) Some halogen-free acyclic task-specific ionic liquids (TSILs) were synthesized as novel and recyclable catalysts for the synthesis of 5-oxo-5,6,7,8-tetrahydro-4H-benzo[b]pyrans by one-pot three-component condensation of aromatic aldehyde, malononitrile (or ethyl cyanoacetate), and dimedone (or 1,3-cyclohexanedione) in water. The condensation accomplished successfully with good yields ranged from 86 to 94%. After the reaction, the products could simply be separated from the catalyst/water, and the catalyst could be reused at least 10 times without noticeably decreasing the catalytic activity. © 2009 HeteroCorporation.

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