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Your search keyword '"Li Shen"' showing total 10 results
Start Over Author "Li Shen" Topic diastereoselective syntheses, enantioselective syntheses (incl. cis/trans-isomerism) Publisher wiley-blackwell
10 results on '"Li Shen"'

2. ChemInform Abstract: Chiral Phosphoric Acid Catalyzed Enantioselective Decarboxylative Alkylation of β-Keto Acids with 3-Hydroxy-3-indolyloxindoles.

Author

Tang, Xiao‐Dong, Li, Shen, Guo, Ran, Nie, Jing, and Ma, Jun‐An

Subjects
*PHOSPHORIC acid, *ENANTIOSELECTIVE catalysis, *DECARBOXYLATION, *ALKYLATION, *KETONIC acids
Abstract

The method tolerates a variety of aryl, hetaryl, and alkyl β-keto acids and furnishes the desired 3-functionalized 3-indolyloxindoles with an all-quaternary stereocenter in high yields and enantioselectivities. [ABSTRACT FROM AUTHOR]

Published
2015
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3. ChemInform Abstract: Highly Enantioselective Decarboxylative Mannich Reaction of Malonic Acid Half Oxyesters with Cyclic Trifluoromethyl Ketimines: Synthesis of β-Amino Esters and anti-HIV Drug DPC 083.

Author

Yuan, Hai‐Na, Li, Shen, Nie, Jing, Zheng, Yan, and Ma, Jun‐An

Subjects
*CARBOXYLATES, *MANNICH reaction, *MALONIC acid, *TRIFLUOROMETHYL compounds, *IMINES, *CHEMICAL synthesis, *ENANTIOMERS
Abstract

DPC 083 (X) is prepared in 5 steps starting from the enantiomer of Va. [ABSTRACT FROM AUTHOR]

Published
2014
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4. ChemInform Abstract: Brine-Stabilized 2,2,2-Trifluorodiazoethane and Its Application in the Synthesis of CF3-Substituted Cyclopropane α-Amino Acids.

Author

Zhu, Chuan‐Le, Yang, Li‐Jun, Li, Shen, Zheng, Yan, and Ma, Jun‐An

Subjects
*CYCLOPROPANATION, *AMINO acids, *CHEMICAL synthesis
Abstract

The title cyclopropanation of trisubstituted olefinic azlactones [e.g. (I)] gives the desired products [e.g. (III)] in good to high yields with excellent diastereoselectivities. [ABSTRACT FROM AUTHOR]

Published
2015
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7. ChemInform Abstract: Asymmetric Enynylation of N-Sulfonyl Aldimines Catalyzed by Zn-BINOL Complexes.

Author

Yang, Zhen‐Yan, Liu, Tian‐Lin, Zheng, Yan, Li, Shen, and Ma, Jun‐An

Subjects
*ENANTIOSELECTIVE catalysis, *ALDIMINES, *BINAPHTHOL
Abstract

Various enyne carbinamine products are highly enantioselectively obtained by catalytic asymmetric addition of terminal 3-en-1-ynes to N-sulfonyl aldimines in the presence of Zn-BINOL complexes which are generated in situ from ZnMe2 and chiral binol-type ligands. [ABSTRACT FROM AUTHOR]

Published
2015
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8. ChemInform Abstract: Bisphosphine-Triggered One-Pot Sequential [3 + 2]/[3 + 2] Annulation of Allenoates with Cyclic Ketimines.

Author

Yang, Li‐Jun, Wang, Shuai, Nie, Jing, Li, Shen, and Ma, Jun‐An

Subjects
*ANNULATION, *ALLENE derivatives
Abstract

The article presents chemical equations related to the article "Bisphosphine-Triggered One-Pot Sequential [3 + 2]/[3 + 2] Annulation of Allenoates with Cyclic Ketimines" by S. Wang, and others, published in the "Organic Letters" in 2013.

Published
2014
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9. ChemInform Abstract: Enantioselective Iridium-Catalyzed Hydrogenation of α-Arylcinnamic Acids and Synthesis of (S)-Equol.

Author

Yang, Shuang, Zhu, Shou-Fei, Zhang, Can-Ming, Song, Song, Yu, Yan-Bo, Li, Shen, and Zhou, Qi-Lin

Abstract

The use of indium catalyst (I) mostly allows the hydrogenation of α-arylcinnamic acids under ambient pressure and low loading to afford propionic acid derivatives with excellent enantioselectivities. [ABSTRACT FROM AUTHOR]

Published
2012
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