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Li X.,Jiangxi Silinco Co. | Yu G.,National Monosaccharide Chemical Synthesis Engineering Research Center | Yang J.,National Monosaccharide Chemical Synthesis Engineering Research Center | Tu Y.,National Monosaccharide Chemical Synthesis Engineering Research Center | Xu Z.,National Monosaccharide Chemical Synthesis Engineering Research Center
Speciality Petrochemicals | Year: 2012

9, 9-Bis (methoxymethyl) fluorene (BMMF), a new type of electron donor for Ziegler-Natta polypropylene catalysts, was synthesized from fluorene, metal sodium and chloromethyl methyl ether, which included synthesis of fluorene disodium by reaction of fluorene with metallic sodium andsuccessive methylation of fluorene disodium with chloromethyl methyl ether. The optimal reaction conditions were found as follows: (1) for synthesis of fluorene disodium, diethylene glycol dimethylether was used as solvent, n(fluorene):n(metallic sodium)=1:2.2, the reaction temperature was 65°C, the reaction time was 8.0 h; (2) for methylation reaction, n(fluorene):n(chloromethyl methyl ether)=1:2.4, the reaction temperature was 20°C, the reaction time was 6.0 h. Under above optimal conditions, the yield of BMMF could be up to 66.9%. Source


Xie X.-Q.,National Monosaccharide Chemical Synthesis Engineering Research Center | Zhong Q.,National Monosaccharide Chemical Synthesis Engineering Research Center | Qiu Z.-Y.,National Monosaccharide Chemical Synthesis Engineering Research Center | Liao W.-L.,National Monosaccharide Chemical Synthesis Engineering Research Center
Xiandai Huagong/Modern Chemical Industry | Year: 2015

By using bromoethane and magnesium as griganrd reagent, diethylmethoxyborane is synthesized through the necleophilic substitution reaction between trimethylborate and griganrd reagent and the subsequent treatment with methanol. The optimum process parameters are finally obtained based on several pilot plant experiments. ©, 2015, China National Chemical Information Center. All right reserved. Source


Yan N.,National Monosaccharide Chemical Synthesis Engineering Research Center | Yan N.,Jiangxi Normal University | Xia J.,Jiangxi Normal University | Xiong Y.,National Monosaccharide Chemical Synthesis Engineering Research Center | And 3 more authors.
Chinese Journal of Organic Chemistry | Year: 2014

One-pot three-component reactions of aldehydes with indole and 2,2-pentamethylene-1,3-dioxane-4,6-dione afforded thirteen kinds of 5-[(indol-3-yl)-methyl]-2,2-pentamethylene-1,3-dioxane-4,6-dione derivatives (β-indole derivatives) in the presence of gluconic acid aqueous solution in 66.4%~98.5% yields. The advantages of this protocol were mild reaction conditions, wide substrate scope, high yields and benign to environment, which afforded an effective method to synthesize β-indole derivatives. © 2014 Chinese Chemical Society & SIOC, CAS Source


Yan N.,National Monosaccharide Chemical Synthesis Engineering Research Center | Yan N.,Jiangxi Normal University | Xiong Y.,Jiangxi Normal University | Xia J.,Jiangxi Normal University | And 5 more authors.
Chinese Journal of Organic Chemistry | Year: 2015

A series of novel spirooxindole derivatives were synthesized by three-component domino Knoevenagel-Michael reaction between aldehydes, indole and 6, 10-dioxaspiro[4.5]decane-7, 9-dione using the deep eutectic solvent (DES) choline chloride-oxalic acid as a catalyst in 70%~97% yields. This method has some distinct advantages such as easy work-up, mild reaction conditions, short reaction time, environmental friendliness and accessibility of catalyst. © 2015 Chinese Chemical Society & SIOC, CAS. Source

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