l-Proline supported on ionic liquid-modified magnetic nanoparticles as a highly efficient and reusable organocatalyst for direct asymmetric aldol reaction in water
文献信息
Yu Kong, Rong Tan, Lili Zhao
Grafting L-proline on imidazolium-based ionic liquid (IL)-functionalized magnetic nanoparticles afforded a magnetically recoverable L-proline catalyst. Characterization technologies suggested the presence of an L-proline backbone, an IL linker, and a magnetic ferrite core in the catalyst. The resulting L-proline catalyst was efficient for direct asymmetric aldol reaction in water without the need for organic solvents and co-catalysts. Such efficiency is attributed to the fact that the IL moiety facilitated the accessibility of hydrophobic reactants to active sites in water and stabilized the formed enamine intermediate during the reaction. High activity (yield = 92%), diastereoselectivity (dr; 88/12) and enantioselectivity (ee; 85%) were obtained using 10 mol% of a catalyst for the reaction between cyclohexanone and 2-nitrobenzaldehyde within 12 h, where the pristine L-proline and IL-free counterpart were almost inactive. The catalyst was easily separated using a permanent magnet externally and can be reused several times without significant loss of activity.
期刊推荐
相关文献
Temperature-induced large amplitude conformational change in the complex of oxatub[4]arene revealed via rotaxane synthesis
Dong-Hao Li, Liu-Pan Yang, Hongxin Chai, Fei Jia, Hua Ke, Wei Jiang
DOI: 10.1039/C9QO00159J
Silver-catalyzed geminal aminofluorination of diazoketones with anilines and N-fluorobenzenesulphonimide
Jun Huang, Linyong Li, Haoguo Chen, Tiebo Xiao, Yuwei He, Lei Zhou
DOI: 10.1039/C6QO00813E
Phosphine-mediated domino reactions of phthalimidomalonates with allenoates or but-2-ynoate: facile entry into highly functionalized pyrroloisoindolinone derivatives
Zhusheng Huang, Qingqing Chen, Xiuqin Yang, Yang Liu, Li Zhang, Tao Lu, Qingfa Zhou
DOI: 10.1039/C6QO00775A
Synthesis, characterization and crystal structures of novel fluorinated di(thiazolyl)benzene derivatives
Maciej Barłóg, Ihor Kulai, Xiaozhou Ji, Nattamai Bhuvanesh, Somnath Dey, Eric Pierre Sliwinski, Hassan S. Bazzi, Lei Fang, Mohammed Al-Hashimi
DOI: 10.1039/C9QO00044E
The impact of interplay between electronic and steric effects on the synthesis and the linear and non-linear optical properties of diketopyrrolopyrrole bearing benzofuran moieties
Anna Purc, Beata Koszarna, Irina Iachina, Daniel H. Friese, Mariusz Tasior, Krzysztof Sobczyk, Tomasz Pędziński, Jonathan Brewer, Daniel T. Gryko
DOI: 10.1039/C6QO00869K
5-Azadibenzo[a,g]corannulene
V. M. Tsefrikas, A. K. Greene, L. T. Scott
DOI: 10.1039/C6QO00831C
Pentadecaphenylenes: synthesis, self-assembly and complexation with fullerene C60
M. Jalilur Rahman, Hideyuki Shimizu, Masashi Hasegawa, Masahiko Iyoda
DOI: 10.1039/C7QO00258K
Efficient synthesis of multiply substituted butenolides from keto acids and terminal alkynes promoted by combined acids
Wenbin Mao
DOI: 10.1039/C6QO00820H
Selective thionation of naphtho[2,3-b]thiophene diimide: tuning of the optoelectronic properties and packing structure
Masahiro Nakano, Kazuo Takimiya, Qichun Zhang
DOI: 10.1039/C6QO00871B
您可能还喜欢
如何储存8-溴-4-羟基-6-(三氟甲氧基)喹啉-3-羧酸乙酯(CAS号:1072944-81-0)?
8-溴-4-羟基-6-(三氟甲氧基)喹啉-3-羧酸乙酯应储存在阴凉、干燥的地方,避免光照和高温。建议使用密封容器进行储存,以防止水分和空气的影响。
2,2-二(2-呋喃基)丙烷(CAS号:17920-88-6)的市场或研究趋势如何?
2,2-二(2-呋喃基)丙烷的研究趋势主要集中在新型材料的开发和应用,如高分子材料、有机光电材料等。市场趋势方面,随着环保要求的提高和新材料的应用,该化合物的需...
如何处理含有螺[呋喃并[3,4-b]吡啶-5(7H),4'-哌啶]-7-酮盐酸盐(CAS号:475152-31-9)的废料?
对于含有螺[呋喃并[3,4-b]吡啶-5(7H),4'-哌啶]-7-酮盐酸盐的废料,应首先进行分类和分离,以减少危险物质的数量。随后,可以考虑通过化学氧化、生物...
Cinnamyl 3-aminobut-2-enoate(CAS号:113898-97-8)安全吗?
Cinnamyl 3-氨基丁-2-烯酸在接触皮肤和眼睛时可能会引起刺激。应避免吸入其粉尘和烟雾。操作时应穿戴适当的个人防护装备,如手套、护目镜和实验室外套。
反式-2-十二碳烯二酸(CAS号:6402-36-4)的市场或研究趋势如何?
反式-2-十二碳烯二酸在医药、材料科学等领域有一定的应用,但其市场相对较小。近年来,由于环保意识的提升,对环境友好型化学品的需求增加,研究倾向于开发更绿色的合成...
什么是(9ci)-1H-苯并咪唑-5-乙酸(CAS号:473895-86-2)?
(9ci)-1H-苯并咪唑-5-乙酸是一种含氮杂环化合物,其化学结构为1H-苯并咪唑-5-乙酸。该化合物具有特定的分子式C8H7NO2,属于有机酸类化合物。
酞菁蓝(CAS号:147-14-8)的主要用途是什么?
酞菁蓝主要用作颜料和染料,广泛应用于塑料、油墨、涂料、纺织品及橡胶工业中。它也用于光敏材料,如太阳能电池和光刻胶。在医疗领域,酞菁蓝因其光敏特性被用于某些光动力...
5-甲基-1,2,3,4-四氢异喹啉(CAS号:123593-99-7)安全吗?
5-甲基-1,2,3,4-四氢异喹啉在使用和储存时需要谨慎处理。它具有一定的毒性,应避免吸入其蒸气或直接接触皮肤和眼睛。操作此化合物时,建议佩戴防护眼镜、实验服...
如何处理含有3',4',5'-三甲氧基苯乙酮(CAS号:1136-86-3)的废料?
含有3',4',5'-三甲氧基苯乙酮的废液应首先确保其是否为危险废物,根据当地法规确定处理方法。通常,这类有机废液可以采用中和反应降低其pH值,然后通过蒸馏或萃...
如何储存KI-7(CAS号:1489263-00-4)?
KI-7应储存在通风良好的干燥环境中,避免光照和高温。建议使用密封容器储存,并保持在阴凉处。储存温度应控制在室温范围内,一般建议不超过25°C。避免与氧化剂接触...
来源期刊
Green Chemistry

Green Chemistry provides a unique forum for the publication of innovative research on the development of alternative green and sustainable technologies. The scope of Green Chemistry is based on, but not limited to, the definition proposed by Anastas and Warner (Green Chemistry: Theory and Practice, P T Anastas and J C Warner, Oxford University Press, Oxford, 1998). Green chemistry is the utilisation of a set of principles that reduces or eliminates the use or generation of hazardous substances in the design, manufacture and application of chemical products. Green Chemistry is at the frontiers of this continuously-evolving interdisciplinary science and publishes research that attempts to reduce the environmental impact of the chemical enterprise by developing a technology base that is inherently non-toxic to living things and the environment. Submissions on all aspects of research relating to the endeavour are welcome. The journal publishes original and significant cutting-edge research that is likely to be of wide general appeal. To be published, work must present a significant advance in green chemistry. Papers must contain a comparison with existing methods and demonstrate advantages over those methods before publication can be considered. For more information please see this Editorial. Coverage includes the following, but is not limited to: Design (e.g. biomimicry, design for degradation/recycling/reduced toxicity…) Reagents & Feedstocks (e.g. renewables, CO2, solvents, auxiliary agents, waste utilization…) Synthesis (e.g. organic, inorganic, synthetic biology…) Catalysis (e.g. homogeneous, heterogeneous, enzyme, whole cell…) Process (e.g. process design, intensification, separations, recycling, efficiency…) Energy (e.g. renewable energy, fuels, photovoltaics, fuel cells, energy storage, energy carriers…) Applications (e.g. electronics, dyes, consumer products, coatings, pharmaceuticals, preservatives, building materials, chemicals for industry/agriculture/mining…) Impact (e.g. safety, metrics, LCA, sustainability, (eco)toxicology…) Green chemistry is, by definition, a continuously-evolving frontier. Therefore, the inclusion of a particular material or technology does not, of itself, guarantee that a paper is suitable for the journal. To be suitable, the novel advance should have the potential for reduced environmental impact relative to the state of the art. Green Chemistry does not normally deal with research associated with 'end-of-pipe' or remediation issues.














