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Your search keyword '"Xiao, Wen"' showing total 445 results
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445 results on '"Xiao, Wen"'

1. ChemInform Abstract: In(OTf)3 /Acid Co-Catalyzed Hydration of 1-Haloalkynes to α-Halomethyl Ketones

Author

Fang Xiao, Wen-Yi Li, Yi-Yuan Zhang, Fu-Ling He, Ming Zeng, Xiao-Wen Liu, and Rui-Xue Huang

Subjects
chemistry.chemical_compound, Trifluoromethyl, chemistry, Alkoxy group, Substrate (chemistry), Halide, General Medicine, Medicinal chemistry, Catalysis
Abstract

A novel and efficient In(OTf)3 and HOAc cooperatively catalyzed hydration of 1-haloalkynes is described. This method provides ready access to α-chloromethyl ketones, α-bromomethyl ketones and α-iodomethyl ketones in moderate to high yields from simple, inexpensive starting materials. A broad substrate scope is achieved, and the reaction is compatible with various functional groups, including alkoxy, trifluoromethyl, halide, hydroxyl, cyclohexyl, and heterocyclic groups.

Published
2016

44. ChemInform Abstract: A New Lignan from Gynostemma pentaphyllum

Author

Hua Ping Zhang, Feng Chen, Xi Wang, Xiao Wen Wang, and Wei Ye Wen

Subjects
Lignan, chemistry.chemical_compound, biology, Chemistry, Stereochemistry, General Medicine, Gynostemma pentaphyllum, biology.organism_classification, Two-dimensional nuclear magnetic resonance spectroscopy
Abstract

A new lignan ligballinone 1 with the know ligballinol 2 were isolated from plant Gynostemma pentaphyllum . Their structures were determined through spectroscopic methods including ESI-MS, 1D and 2D NMR ( 1 H, 13 C, DEPT, 1 H- 1 H COSY, HMQC, HMBC) and X-ray diffraction experiment for 2 .

Published
2009

46. Studies Toward the Synthesis of Azadirachtin. Part 2. Construction of Fully Functionalized ABCD Ring Frameworks and Unusual Intramolecular Reactions Induced by Close-Proximity Effects

Author

Goran Petrovic, Pradip K. Sasmal, Antonella Converso, Constantinos C. Dellios, Florian Kaiser, Eriketi Z. Loizidou, Anthony J. Roecker, Kyriacos C. Nicolaou, Xiao-Wen Sun, and Theocharis V. Koftis

Subjects
Terpene, chemistry.chemical_compound, Azadirachtin, chemistry, Stereochemistry, Intramolecular force, Total synthesis, General Medicine, Ring (chemistry)
Abstract

The remarkable antifeedant agent and insecticide, azadirachtin (1), has, to date, escaped a total synthesis. The preparation of an advanced precursor has revealed some of the inner intricacies of this uniquely crowded and highly functionalized molecular architecture.

Published
2005

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