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Your search keyword '"Qiong Chang"' showing total 6 results
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6 results on '"Qiong Chang"'

1. Methylsulfonic Acid Adsorbed on Silica Gel as a Solid Acid for Dimerization of Indoles: A Convenient Synthesis of 2,3′-Bi(3H-indol)-3-one Oximes

Author

Liang-Xian Liu, Qiong Chang, Hongen Qu, Zhengwang Chen, and Wenbing Qin

Subjects
Indole test, chemistry.chemical_compound, Adsorption, chemistry, Cascade reaction, Silica gel, Organic Chemistry, Organic chemistry, Solid acid, Oxime, Sodium nitrite, Coupling reaction
Abstract

A simple, convenient, and efficient approach for the synthesis of (E)-2,3′-bi(3H-indol)-3-one oxime derivatives has been developed. The methodology is based on a three-component coupling reaction of indoles and sodium nitrite using a silica-supported methylsulfonic acid as solid acid. The practical utility of this three-component coupling reaction has been demonstrated in the gram-scale dimerization of indole. [Supplementary materials are available for this article. Go to the publisher's online edition of Synthetic Communications® for the following free supplemental resource: Full experimental and spectral details.]

Published
2013

4. ChemInform Abstract: Methylsulfonic Acid Adsorbed on Silica Gel as a Solid Acid for Dimerization of Indoles: A Convenient Synthesis of 2,3′-Bi(3H-indol)-3-one Oximes

Author

Liang-Xian Liu, Qiong Chang, Hongen Qu, Wenbing Qin, and Zhengwang Chen

Subjects
Indole test, chemistry.chemical_compound, Adsorption, chemistry, Silica gel, General Medicine, Solid acid, Oxime, Sodium nitrite, Combinatorial chemistry, Coupling reaction
Abstract

A simple, convenient, and efficient approach for the synthesis of (E)-2,3′-bi(3H-indol)-3-one oxime derivatives has been developed. The methodology is based on a three-component coupling reaction of indoles and sodium nitrite using a silica-supported methylsulfonic acid as solid acid. The practical utility of this three-component coupling reaction has been demonstrated in the gram-scale dimerization of indole. [Supplementary materials are available for this article. Go to the publisher's online edition of Synthetic Communications® for the following free supplemental resource: Full experimental and spectral details.]

Published
2013

5. ChemInform Abstract: Metal-Free Catalyzed Oxidative Trimerization of Indoles by Using TEMPO in Air: A Biomimetic Approach to 2-(1H-Indol-3-yl)-2,3′-biindolin-3-ones

Author

Liang-Xian Liu, Qiong Chang, Zhengwang Chen, Ning Wang, Yun-Hong Bao, and Wenbing Qin

Subjects
Metal free, Chemistry, General Medicine, Oxidative phosphorylation, Combinatorial chemistry, Catalysis
Abstract

A novel, operationally simple, and practical biomimetic synthetic method for the trimerization of indoles using TEMPO in air as oxidant is presented.

Published
2013

6. Metal-free catalyzed oxidative trimerization of indoles by using TEMPO in air: a biomimetic approach to 2-(1H-indol-3-yl)-2,3′-biindolin-3-ones

Author

Ning Wang, Yun-Hong Bao, Qiong Chang, Wenbing Qin, Zhengwang Chen, and Liang-Xian Liu

Subjects
Models, Molecular, Indoles, Tandem, Chemistry, Organic Chemistry, Oxidative phosphorylation, Oxidants, Biochemistry, Catalysis, Cyclic N-Oxides, Metal free, Biomimetics, Organic chemistry, Physical and Theoretical Chemistry, Oxidation-Reduction
Abstract

A simple, convenient and efficient metal-free catalyzed oxidative trimeric reaction of indoles toward a variety of 2-(1H-indol-3-yl)-2,3'-biindolin-3-one derivatives in moderate to excellent yields has been developed. This transformation proceeds via a tandem oxidative homocoupling reaction by using TEMPO in air as an environmentally benign oxidant. This methodology provides an alternative approach for the direct generation of all-carbon quaternary centers at the C3 position of indoles.

Published
2012

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