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Conjugate Additions of secondary amines and Water to Allenyl Perfluoroalkyl Sulfones

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Chinese Journal of Chemistry 2006年第6期24卷 775-780页

作者：王小进林云刘金涛 Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China

Preparation of allenyl perfluoroalkyl sulfones from perfluoroalkyl sulfinyl chlorides and their reactions with secondary amines and water were studied. At room temperature secondary amines reacted readily with allenyl perfluoroalkyl sulfones to give the corresponding enamine adducts, which underwent rearrangement to afford conjugate enamines in refluxing toluene. Good diastereoslectivities were observed in the addition of diethylamine to 7-ethyl-7-methylallenyl perfluoroalkyl sulfones. In refluxing acetonitrile, water could also undergo the similar addition with allenyl perfluoroalkyl sulfones.

关键词： allenyl perfluoroalkyl sulfone conjugate addition secondary amine water

Mercurous Chloride Catalyzed Mannich Condensation of Terminal Alkynes with secondary amines and Aldehydes

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Chinese Journal of Chemistry 2005年第8期23卷 1076-1080页

作者：李品华王磊 Department of Chemistry Huaibei Coal Teacher College Huaibei Anhui 235000 China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China

Mercurous chloride catalyzed Mannich condensation of terminal alkynes with secondary amines and aldehydes has been developed. The reaction generated β-aminoalkynes in good yields.

关键词： Mannich reaction terminal alkyne secondary amine aldehyde β-aminoalkyne mercurous chloride

Tri-n-butylphosphane catalyzed ring opening of aziridines with secondary amines

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Chinese Chemical Letters 2012年第6期23卷 657-660页

作者： Wan Xuan Zhang Li Su Wei Gang Hu Jie Zhou Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules Hubei University Wuhan 430062 China

Ring opening of aziridine with dialkyl amine took place readily in the presence of catalytic amounts of tri-n-butylphosphane （10 mol%） in the mixture of CH3CN/H20 （10：1）, giving corresponding vicinal diamines in mediate to high yields （58-95%） with good regioselectivitie, while aromatic secondary amine could not react under the same conditions. Tri-n-butylphosphane exhibited different catalytic selectivity to amines from Lewis acid catalysts.

关键词： Aziridines Ring-opening reaction secondary amine Tfi-n-butylphosphane Vicinal diamine

Occurrence of selected aliphatic amines in source water of major cities in China

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Journal of Environmental Sciences 2012年第11期24卷 1885-1890页

作者： Haifeng Zhang Shuoyi Ren Jianwei Yu Min Yang State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China College of Geosciences China University of PetroleumBeijing 102249China

The formation of toxic nitrogenous disinfection byproducts （N-DBPs）, such as nitrosamines, halonitromethanes and haloacetonitriles, from reactions between chlorine/chloramine and dissolved organic nitrogen in drinking water has caused great concern with regarding public health. This study revealed the occurrence of 17 aliphatic amines, some of which have been confirmed to be the precursors of N-DBPs, in source water across China. A sensitive method based on benzenesulfonyl chloride derivatization and liquid-liquid extraction followed by GC-MS analysis was established for the simultaneous analysis of the selected amines in aqueous samples. In total, 37 source water samples from the capital cities of 20 provinces were collected for the survey. Among the 17 amines, 14 were detected with an average frequency of detection of 36%. The most relevant amines in terms of frequency and maximum concentrations detected were dimethylamine （100%, 24.82 μg/L）, methylamine （78%, 0.92 μg/L）, N-methylethylamine （70%, 8.84 μg/L）, propylamine （59%, 10.69 μg/L）, diethylamine （54%, 3.76μg/L）, N-methylbutylamine （35%, 3.07 μg/L）, N-ethylpropylamine （35%, 0.52μg/L）, and piperidine （32%, 2.35 μg/L）. This is the first large scale survey of the aliphatic amines occurrence in source water in the world. The wide presence of nitrosamine precursors like dimethylamine, N-methylethylamine and diethylamine, and the precursors of haloacetonitriles and halonitromethanes like methylamine and propylamine suggests that better source water management is required to ensure the safety of drinking water.

关键词： primary amine secondary amine drinking water disinfection byproducts

Microalgae wet extraction using N-ethyl butylamine for fatty acid production

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Green Energy & Environment 2016年第1期1卷 79-83页

作者： Ying Du Boelo Schuur Sascha R.A.Kersten Derk W.F.Brilman University of Twente Sustainable Process Technology Group(SPT)Faculty of Science and Technology

Microalgae are considered a promising feedstock for the production of food ingredients, cosmetics, pharmaceutical products and *** energy intensity of drying and cell breaking of algae and solvent recovery afterwards hindered the route of algae biorefinery. In this work the influences of freeze drying and cell breaking to the extraction efficiency of crude lipid yield and fatty acid yield were investigated. Results showed that drying and cell breaking are not necessary for N-ethyl butylamine extraction, because good yields were obtained without. Crude lipid yield and fatty acid yield using N-ethyl butylamine were comparable with Bligh & Dyer extraction, making N-ethyl butylamine a candidate for further development of an energy efficient lipid extraction technology for non-broken microalgae.

关键词： Microalgae Lipids Extraction Switchable solvent secondary amine

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仲胺萃取铌的性能和机理研究

陕西师大学报(自然科学版) 1989年第2期 90-92页

作者：余建民杨子超王秀山阎居梅陕西师范大学化学系

铌在酸性硫氰酸盐溶液中比较稳定,可被正丁醇、环己酮、磷酸三丁酯、N.N-二烷基苯胺等萃取.鉴于在酸性溶液中铌与硫氰酸盐形成络阴离子,可望能被胺型萃取剂萃取,本文研究了仲胺萃取铌硫氰酸盐络合物的性能和机理.测定了萃合物的组成,讨... 详细信息

铌在酸性硫氰酸盐溶液中比较稳定,可被正丁醇、环己酮、磷酸三丁酯、N.N-二烷基苯胺等萃取.鉴于在酸性溶液中铌与硫氰酸盐形成络阴离子,可望能被胺型萃取剂萃取,本文研究了仲胺萃取铌硫氰酸盐络合物的性能和机理.测定了萃合物的组成,讨论了萃合物的紫外-可见吸收光谱和红外光谱. 1 实验部分 1.1 试剂和溶液仲胺7203,核工业部北京五所研制;A1416,中科院上海有机化学研究所产品;煤油,

关键词： niobium secondary amine extraction mechanism