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Your search keyword '"Deng, Feng"' showing total 39 results
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39 results on '"Deng, Feng"'

1. ChemInform Abstract: Enantioselective Synthesis of Chiral α,β-Unsaturated γ-Substituted Butyrolactams by Organocatalyzed Direct Asymmetric Vinylogous Michael Addition of α,β-Unsaturated γ-Butyrolactam to 2-Enoylpyridines

Author

Zhi-Jun Wu, Zhen-Hua Wang, Xiao-Ying Xu, Wei-Cheng Yuan, Xiao-Mei Zhang, Deng-Feng Yue, and Yong You

Subjects
chemistry.chemical_compound, Chemistry, Michael reaction, Enantioselective synthesis, General Medicine, Optically active, Bifunctional, Medicinal chemistry, Catalysis
Abstract

An organocatalyzed direct asymmetric vinylogous Michael addition reaction of α,β-unsaturated γ-butyrolactam to 2-enoylpyridines has been developed with a chiral bifunctional amine-squaramide as the catalyst. This approach provides easy access to a series of optically active α,β-unsaturated γ-substituted butyrolactams in high yields (up to 99%) with excellent diastereoselectivities (up to >99:1) and enantioselectivities (up to >99% ee).

Published
2016

2. ChemInform Abstract: Asymmetric Michael Reaction of Arylacetyl Phosphonates to Nitroalkenes with Bifunctional Amine-Thiourea Catalyst Bearing Multiple-Hydrogen-Bond Donor: Efficient Construction of Chiral α-Substituted Carboxylic Ester Compounds

Author

Wei-Cheng Yuan, Zhen-Hua Wang, Yong You, Lin Chen, Deng-Feng Yue, Xiao-Mei Zhang, Xiao-Ying Xu, and Ming-Liang Zhang

Subjects
chemistry.chemical_compound, chemistry, Thiourea, Hydrogen bond, Michael reaction, Amine gas treating, General Medicine, Bifunctional, Carboxylic ester, Medicinal chemistry, Catalysis, Stereocenter
Abstract

Catalytic asymmetric Michael addition of arylacetyl phosphonates to nitroalkenes was achieved with a chiral bifunctional amine-thiourea bearing a multiple-hydrogen-bond donor as a catalyst. A range of α-substituted carboxylic ester compounds with contiguous tertiary stereocenters could be smoothly obtained in good yields (up to 85%) and with high to excellent diastereo- and enantioselectivities (up to >99:1 dr and 95% ee). The large scale experiment and facile synthesis of a chiral γ-butyrolactam have also been demonstrated.

Published
2016

3. ChemInform Abstract: A Neber Approach for the Synthesis of Spiro-Fused 2H-Azirine-Pyrazolone

Author

Zhen-Hua Wang, Wei-Cheng Yuan, Xiao-Mei Zhang, Deng-Feng Yue, Jian-Qiang Zhao, and Xiao-Ying Xu

Subjects
Azirine, Sulfonyl, chemistry.chemical_classification, chemistry.chemical_compound, Chemistry, Pyrazolone, medicine, General Medicine, Medicinal chemistry, Tautomer, medicine.drug, Catalysis
Abstract

A base-mediated Neber reaction of enaminopyrazolones, which are the tautomers of 4-acyloxime-2-pyrazolin-5-ones, with sulfonyl chlorides was achieved. With this developed approach, a range of spiro-fused 2H-azirine-pyrazolones were obtained in good yields under mild conditions. A preliminary trial of a catalytic asymmetric version of the Neber reaction was conducted and gave promising enantioselectivity.

Published
2016

4. ChemInform Abstract: Organocatalytic Asymmetric Henry Reaction of 1H-Pyrrole-2,3-diones with Bifunctional Amine-Thiourea Catalysts Bearing Multiple Hydrogen-Bond Donors

Author

Xiao-Ying Xu, Deng-Feng Yue, Zhen-Hua Wang, Xiao-Mei Zhang, Yuan Luo, Ming-Liang Zhang, and Wei-Cheng Yuan

Subjects
chemistry.chemical_compound, Nitroaldol reaction, chemistry, Thiourea, Hydrogen bond, Amine gas treating, General Medicine, Bifunctional, Medicinal chemistry, Stereocenter, Catalysis, Pyrrole
Abstract

For the first time, a catalytic asymmetric Henry reaction of 1H-pyrrole-2,3-diones was achieved with a chiral bifunctional amine-thiourea as a catalyst possessing multiple hydrogen-bond donors. With this developed method, a range of 3-hydroxy-3-nitromethyl-1H-pyrrol-2(3H)-ones bearing quaternary stereocenters were obtained in acceptable yield (up to 75%) and enantioselectivity (up to 73% ee).

Published
2016

5. ChemInform Abstract: Organocatalytic Asymmetric Michael/Cyclization Cascade Reactions of 3-Hydroxyoxindoles/3-Aminooxindoles with α,β-Unsaturated Acyl Phosphonates for the Construction of Spirocyclic Oxindole-γ-lactones/lactams

Author

Deng-Feng Yue, Zhi-Jun Wu, Xiao-Ying Xu, Lin Chen, Xiao-Mei Zhang, Wei-Cheng Yuan, and Ming-Liang Zhang

Subjects
chemistry.chemical_compound, chemistry, Stereochemistry, Organocatalysis, Enantioselective synthesis, Squaramide, Oxindole, General Medicine, Cinchonine, Catalysis
Abstract

Enantioselective Michael/cyclization cascade reactions of 3-hydroxyoxindoles/3-aminooxindoles with α,β-unsaturated acyl phosphonates by using a cinchonine derived squaramide as the catalyst were developed. A broad range of spirocyclic oxindole-γ-lactones/lactams could be obtained in moderate to excellent yields (up to 98%) with good to excellent diastereo- and enantioselectivities (up to >99:1 dr and 97% ee) under mild conditions. This work represents the first example about the α,β-unsaturated acyl phosphonates for the asymmetric construction of spirocyclic oxindoles.

Published
2016

6. ChemInform Abstract: Diastereo- and Enantioselective Direct Vinylogous Michael Addition of γ-Substituted Butenolides to 2-Enoylpyridines Catalyzed by Chiral Bifunctional Amine-Squaramides

Author

Xiao-Ying Xu, Yong You, Wei-Cheng Yuan, Xiao-Mei Zhang, Xue-Qun Huang, Zhen-Hua Wang, Deng-Feng Yue, and Zhi-Jun Wu

Subjects
chemistry.chemical_compound, Chemistry, Stereochemistry, Organocatalysis, Michael reaction, Enantioselective synthesis, Amine gas treating, General Medicine, Bifunctional, Stereocenter, Catalysis, Butenolide
Abstract

The diastereo- and enantioselective direct vinylogous Michael addition reaction of γ-substituted butenolides to 2-enoylpyridines has been achieved. A range of γ,γ-disubstituted butenolide derivatives, bearing two consecutive tri- and tetrasubstituted stereogenic centers, were readily obtained in good yields with excellent stereoselectivities (up to >99 : 1 dr and >99% ee).

Published
2016

7. ChemInform Abstract: Asymmetric Michael/Cyclization Cascade Reaction of 3-Isothiocyanato Oxindoles and 3-Nitroindoles with Amino-Thiocarbamate Catalysts: Enantioselective Synthesis of Polycyclic Spirooxindoles

Author

Zhen-Hua Wang, Xiao-Mei Zhang, Deng-Feng Yue, Jian-Qiang Zhao, Xiao-Ying Xu, Wei-Cheng Yuan, Ming-Qiang Zhou, and Zhi-Jun Wu

Subjects
Thiocarbamate, Cascade reaction, Chemistry, Organocatalysis, Enantioselective synthesis, General Medicine, Combinatorial chemistry, Catalysis
Abstract

The scalable and efficient method provides various polycyclic spirooxindoles with three contiguous chiral centers, two of which are quarternary, in excellent yields and with high to excellent dia- and enantioselectivities.

Published
2015

9. ChemInform Abstract: Asymmetric Michael Reaction of Arylacetyl Phosphonates to Nitroalkenes with Bifunctional Amine-Thiourea Catalyst Bearing Multiple-Hydrogen-Bond Donor: Efficient Construction of Chiral α-Substituted Carboxylic Ester Compounds.

Author

Zhang, Ming-Liang, primary, Chen, Lin, additional, You, Yong, additional, Wang, Zhen-Hua, additional, Yue, Deng-Feng, additional, Zhang, Xiao-Mei, additional, Xu, Xiao-Ying, additional, and Yuan, Wei-Cheng, additional

Published
2016
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13. ChemInform Abstract: Organocatalytic Asymmetric Michael/Cyclization Cascade Reactions of 3‐Hydroxyoxindoles/3‐Aminooxindoles with α,β‐Unsaturated Acyl Phosphonates for the Construction of Spirocyclic Oxindole‐γ‐lactones/lactams.

Author

Chen, Lin, primary, Wu, Zhi‐Jun, additional, Zhang, Ming‐Liang, additional, Yue, Deng‐Feng, additional, Zhang, Xiao‐Mei, additional, Xu, Xiao‐Ying, additional, and Yuan, Wei‐Cheng, additional

Published
2016
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16. ChemInform Abstract: Asymmetric Michael/Cyclization Cascade Reaction of 3‐Isothiocyanato Oxindoles and 3‐Nitroindoles with Amino‐Thiocarbamate Catalysts: Enantioselective Synthesis of Polycyclic Spirooxindoles.

Author

Zhao, Jian‐Qiang, primary, Zhou, Ming‐Qiang, additional, Wu, Zhi‐Jun, additional, Wang, Zhen‐Hua, additional, Yue, Deng‐Feng, additional, Xu, Xiao‐Ying, additional, Zhang, Xiao‐Mei, additional, and Yuan, Wei‐Cheng, additional

Published
2015
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37. ChemInform Abstract: Synthesis, Structure and NMR Characterization of a New Monomeric Aluminophosphate [dl‐Co(en)3]2[Al(HPO4)2(H1.5PO4)2(H2PO4)2] (H3PO4)4Containing Four Different Types of Monophosphates.

Author

Chen, Peng, Li, Jiyang, Xu, Jun, Duan, Fangzheng, Deng, Feng, and Xu, Ruren

Abstract

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Published
2009
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39. ChemInform Abstract: Hydrothermal Synthesis and Structural Characterization of Three Organically Templated Titanium Phosphates: Ti2(HPO4)2(PO4)2×C2N2H10, Ti3(H2PO4)(HPO4)3.5(PO4)2×C2N2H10, and Ti7(HPO4)6(PO4)6×C3N2H12.

Author

Liu, Yunling, Shi, Zhan, Fu, Yunlong, Chen, Wei, Li, Baozong, Hua, Jia, Liu, Wuyang, Deng, Feng, and Pang, Wenqin

Abstract

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Published
2002
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