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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. Source


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. Source


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. Source


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. Source


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. Source

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