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Bifunctional phase-transfer catalysts for synthesis of 2-oxazolidinones from isocyanates and epoxides

Autor: Ping Huang, Zhuang Tian, Ping-An Wang, Yanyan Jia, Dong-Xiao Cui, Yue-Dan Li

Publikováno v: RSC Advances. 10:12360-12364

A series of bifunctional phase-transfer catalysts (PTCs) were synthesized to catalyze the [3 + 2] coupling reaction of isocyanates and epoxides to afford 2-oxazolidinones in good to high yields (up to 92% yield) using PhCl as a solvent at 100 °C wit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6bcad09ea9f2bb46914f16e0a5256e35
https://doi.org/10.1039/d0ra00693a

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Tandem grinding reactions involving aldol condensation and Michael addition in sequence for synthesis of 3,4,5-trisubstituted isoxazoles

Autor: Yue-Dan Li, Xiao-Mu Hu, Hai Dong, Zhuang Tian, Ping Huang, Ping-An Wang

Publikováno v: RSC Advances. 9:27883-27887

A one-pot, base-catalyzed, tandem grinding process involving carrying out aldol condensation and Michael addition in sequence to produce 3,4,5-trisubstituted isoxazoles from 3,5-dimethyl-4-nitroisoxazole, aromatic aldehydes and activated methylene co

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5908f627df633dc407a55b591614856a
https://doi.org/10.1039/c9ra04864b

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Bifunctional phase-transfer catalysts for fixation of CO2 with epoxides under ambient pressure

Autor: Yanyan Jia, Yue-Dan Li, Zhuang Tian, Jun-Chao Zhu, Ping-An Wang, Ping Huang, Dong-Xiao Cui

Publikováno v: Green Chemistry. 21:5231-5237

A series of bifunctional phase-transfer catalysts with a quaternary onium center and a hydrogen-bonding donor group were prepared for the fixation of CO2 with commercially available epoxides under mild conditions by using a CO2 balloon (1 atm). In th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c69ac81bef699905bc64b276de66483e
https://doi.org/10.1039/c9gc02058f

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Enantioselective amination of nitroolefins under base-free and water-rich conditions using chiral bifunctional phase-transfer catalysts

Autor: Weiping Chen, Jingxu He, Dong-Xiao Cui, Yue-Dan Li, Jun-Chao Zhu, Ping-An Wang

Publikováno v: Organic & Biomolecular Chemistry. 16:3012-3017

The direct enantioselective amination of nitroolefins has been performed with l-tert-leucine-derived squaramide-scaffold bifunctional phase-transfer catalysts under base-free and water-rich conditions with low catalyst loading (0.5-1 mol%) to provide

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8df8b5630e1d524c7d8948751ad25d7c
https://doi.org/10.1039/c8ob00583d

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Highly Efficient Michael Reactions of Nitroolefins by Grinding Means

Autor: Ping-An Wang, Aidong Wen, Yanyan Jia, Dong-Xiao Cui, Yue-Dan Li, Jun-Chao Zhu

Publikováno v: Current organic synthesis. 16(3)

Aim and Objective: The direct β-functionalization of trans-β-nitroolefins by Michael reaction is regarded as an efficient way to provide precursors for β-functional amines. However, Michael additions by grinding means with solvent-free conditons a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0dcc6e022f75514f1890446552ea815c
https://pubmed.ncbi.nlm.nih.gov/31984908

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