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Chiral Phase-transfer Catalysts Bearing multiple hydrogen-bonding Donors Derived from Amino Acids： Efficient Catalysts for Diastereo- and Enantioselective Nitro-Mannich Reaction

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Chemical Research in Chinese Universities 2018年第3期34卷 333-337页

作者： LIU Yu WEI Zhonglin LIU Yuxin WANG Jingdong CAO Jungang LIANG Dapeng DUAN Haifeng LIN Yingjie College of Chemistry Jilin University Changehun 130012 P. R. China

The asymmetric nitro-Mannich reaction is one of the traditional methods for forming carbon-carbon bond. By this reaction, the corresponding products with two contiguous stereocenters containing nitrogen substituents can be obtained. These β-nitro amine products can be easily transformed into 1,2-diamines by reduction of the corresponding nitro groups by means of the Nef reaction. It is well known that chiral 1,2-diamines Nay an important role in many fields.

关键词： multiple hydrogen-bonding Phase-transfer catalyst Nitro-Mannich reaction Aldehyde-derived N-Bocketimine

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Self-healing Hydrogelsand Underlying Reversible Intermolecular Interactions

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Chinese Journal of Polymer Science 2021年第10期39卷 1246-1261,I0005页

作者： Meng Wu Qiong-Yao Peng Lin-Bo Han Hong-Bo Zeng Department of Chemical&Materials Engineering University of AlbertaEdmontonAlberta T6G 1H9Canada College of Health Science and Environmental Engineering Shenzhen Technology UniversityShenzhen 518118China

Self-healing hydrogels have attracted growing attention over the past decade due to their biomimetic structure,biocompatibility,as well as enhanced lifespan and reliability,thereby have been widely used in various biomedical,electrical and environmental engineering *** feature article has reviewed our recent progress in self-healing hydrogels derived from mussel-inspired interactions,multiple hydrogen-bonding functional groups such as 2-ureido-4[1H]-pyrimidinohe(UPy),dynamic covalent bonds(eg,Schiff base reactions and boronic ester bonds).The underlying molecular basics of these interactions,hydrogel preparation principles,and corresponding performances and applications are *** underlying reversible intermolecular interaction mechanisms in these hydrogels were investigated using nanomechanical techniques such as surface forces apparatus(SFA)and atomic force microscopy(AFM),providing fundamental insights into the self-healing mechanisms of the *** remaining challenging issues and perspectives in this rapidly developing research area are also discussed.

关键词： Self-healing hydrogels Mussel-inspired Interaction multiple hydrogen-bonding Dynamic covalent bonds Intermolecular forces

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