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Your search keyword '"Tianbao Yang"' showing total 5 results
Start Over Author "Tianbao Yang" Journal organic letters
5 results on '"Tianbao Yang"'

1. Photo-Induced N–N Coupling of o-Nitrobenzyl Alcohols and Indolines To Give N-Aryl-1-amino Indoles

Author

Nobuaki Kambe, Tianbao Yang, Shuang-Feng Yin, Niu Tang, Renhua Qiu, and Yifeng Ou

Subjects
chemistry.chemical_classification, Aryl, Organic Chemistry, medicine.disease_cause, Biochemistry, Aldehyde, Medicinal chemistry, Fluorescence, Coupling reaction, Rhodamine 6G, Acetic acid, chemistry.chemical_compound, chemistry, medicine, Physical and Theoretical Chemistry, Derivative (chemistry), Ultraviolet
Abstract

A novel method to synthesize N-aryl-1-amino indoles was established by the photoinduced N-N coupling reaction. This protocol is by treatment of o-nitrobenzyl alcohols and indolines in the presence of TEAI and acetic acid with a 24 W ultraviolet (UV) light-emitting diode (LED) (385-405 nm) irradiation. The products bearing an aldehyde group can be further transformed to fluorescent probes based on Rhodamine 6G derivative 11, which shows a high specificity and sensitivity for Fe3+.

Published
2021
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2. UV-Light-Induced N-Acylation of Amines with α-Diketones

Author

Yifeng Ou, Renhua Qiu, Xu Zhihui, Shuang-Feng Yin, Nobuaki Kambe, Niu Tang, and Tianbao Yang

Subjects
In situ, chemistry.chemical_classification, 010405 organic chemistry, Organic Chemistry, 010402 general chemistry, Photochemistry, medicine.disease_cause, 01 natural sciences, Biochemistry, 0104 chemical sciences, Amino acid, chemistry.chemical_compound, chemistry, Benzoin, Yield (chemistry), Light induced, medicine, Irradiation, Benzil, Physical and Theoretical Chemistry, Ultraviolet
Abstract

Herein, we develop a mild method for N-acylation of primary and secondary amines with α-diketones induced by ultraviolet (UV) light. Forty-six examples with various functional groups are explored at room temperature with irradiation by three 26 W UV lamps (350-380 nm). The yield reaches 97%. The gram scale experiment product yield is 76%. Moreover, this system can be applied to the synthesis of several amino acid derivatives. Mechanistic studies show that benzoin is generated in situ from benzil under UV irradiation.

Published
2021
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3. Photo-Induced N-N Coupling of

Author

Yifeng, Ou, Tianbao, Yang, Niu, Tang, Shuang-Feng, Yin, Nobuaki, Kambe, and Renhua, Qiu

Abstract

A novel method to synthesize

Published
2021

4. CF3SO2Na-Mediated, UV-Light-Induced Friedel–Crafts Alkylation of Indoles with Ketones/Aldehydes and Bioactivities of Products

Author

Huiai Lu, Chak-Tong Au, Tianbao Yang, Ling Hong, Renhua Qiu, Yixuan Shu, and Yifeng Ou

Subjects
Indole test, 010405 organic chemistry, Chemistry, Organic Chemistry, Light induced, Organic chemistry, Physical and Theoretical Chemistry, 010402 general chemistry, 01 natural sciences, Biochemistry, Friedel–Crafts reaction, 0104 chemical sciences
Abstract

A concise, one-step route to produce 3,3′-diindolylmethanes (DIMs) from simple indoles and ketones or aldehydes is reported. The key step is the ready formation of indole derivatives that involves ...

Published
2020
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5. CF

Author

Tianbao, Yang, Huiai, Lu, Yixuan, Shu, Yifeng, Ou, Ling, Hong, Chak-Tong, Au, and Renhua, Qiu

Subjects
Aldehydes, Indoles, Alkylation, Molecular Structure, Ultraviolet Rays, Stereoisomerism, Ketones
Abstract

A concise, one-step route to produce 3,3'-diindolylmethanes (DIMs) from simple indoles and ketones or aldehydes is reported. The key step is the ready formation of indole derivatives that involves the in situ conversion of CF

Published
2020

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