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Your search keyword '"Deng, Guo‐Bo"' showing total 4 results
Start Over Author "Deng, Guo‐Bo" Topic ring formation (chemistry)
4 results on '"Deng, Guo‐Bo"'

1. Copper-Catalyzed Aerobic Oxidative Carbocyclization- Ketonization Cascade: Selective Synthesis of Quinolinones.

Author

Xie, Peng, Wang, Zhi ‐ Qiang, Deng, Guo ‐ Bo, Song, Ren ‐ Jie, Xia, Jia ‐ Dong, Hu, Ming, and Li, Jin ‐ Heng

Subjects
QUINOLONE antibacterial agents synthesis, COPPER catalysts, OXIDATION, RING formation (Chemistry), KETONES, CARBON-hydrogen bonds
Abstract

A new thematic extension method is described for the carbocyclization of α-C( sp3)H bonds of amides with alkynes followed by ketonization of the alkynes that utilizes the inexpensive copper(II) acetoacetonate [Cu(acac)2] as catalyst under an oxygen atmosphere to synthesize quinolinones. It is noteworthy that the oxygen atom of the newly formed carbonyl group is from atmospheric molecular oxygen. [ABSTRACT FROM AUTHOR]

Published
2013
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2. Metal-free nitrative cyclization of N-aryl imines with tert-butyl nitrite: dehydrogenative access to 3-nitroindoles.

Author

Deng, Guo-Bo, Zhang, Jia-Ling, Liu, Yan-Yun, Liu, Bang, Yang, Xu-Heng, and Li, Jin-Heng

Subjects
*NITRATION, *RING formation (Chemistry), *NITRITES, *INDOLE, *ISOMERIZATION
Abstract

We describe here a new metal-free route for the synthesis of 3-nitroindoles by the nitrative cyclization of N-aryl imines with tert-butyl nitrite. The radical transformation allows the assembly of the indole framework through oxidative cleavage of multi C–H bonds, a nitration, cyclization and isomerization cascade. [ABSTRACT FROM AUTHOR]

Published
2015
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3. ChemInform Abstract: Copper-Catalyzed Aerobic Oxidative Carbocyclization-Ketonization Cascade: Selective Synthesis of Quinolinones.

Author

Xie, Peng, Wang, Zhi‐Qiang, Deng, Guo‐Bo, Song, Ren‐Jie, Xia, Jia‐Dong, Hu, Ming, and Li, Jin‐Heng

Subjects
*COPPER catalysts, *OXIDATION, *CARBOCYCLIC acids, *KETONES, *QUINOLONE antibacterial agents synthesis, *RING formation (Chemistry), *ALKYNES, *CARBON-hydrogen bonds
Abstract

A wide range of quinolinones is prepared using carbocyclization of α-C(sp3)-H bonds of amides with alkynes followed by ketonization of the alkynes. [ABSTRACT FROM AUTHOR]

Published
2014
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4. ChemInform Abstract: Metal-Free Oxidative Tandem Coupling of Activated Alkenes with Carbonyl C(sp2)-H Bonds and Aryl C(sp2)-H Bonds Using TBHP.

Author

Zhou, Ming‐Bo, Song, Ren‐Jie, Ouyang, Xuan‐Hui, Liu, Yu, Wei, Wen‐Ting, Deng, Guo‐Bo, and Li, Jin‐Heng

Subjects
*RING formation (Chemistry), *ACRYLAMIDE derivatives, *HYDROPEROXIDES, *OXIDIZING agents, *PYRROLE derivatives
Abstract

A novel uncatalyzed oxidative cyclization of the N-phenyl acrylamide derivative (I) is developed using tert-butyl hydroperoxide as the oxidant. [ABSTRACT FROM AUTHOR]

Published
2013
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