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Your search keyword '"Tang, Hao-Yang"' showing total 7 results
Start Over Author "Tang, Hao-Yang" Topic organic chemistry
7 results on '"Tang, Hao-Yang"'

1. Synthesis of Bicyclic Isoxazoles and Isoxazolines via Intramolecular Nitrile Oxide Cycloaddition

Author

Wen-Chang Chen, Veerababurao Kavala, Yu-Hsuan Shih, Yu-Hsuan Wang, Chun-Wei Kuo, Tang-Hao Yang, Chia-Yu Huang, Hao-Hsiang Chiu, and Ching-Fa Yao

Subjects
bicyclic isoxazole/isoxazolines, cycloaddition, nitrile oxide, nitroalkane, Yamaguchi reagent, Organic chemistry, QD241-441
Abstract

An efficient and straight forward procedure for the syntheses of bicyclic isoxazole/isoxazoline derivatives from the corresponding dimethyl-2-(2-nitro-1-aryl/alkyl)-2-(prop-2-yn-1yl)malonates or dimethyl 2-allyl-2-(2-nitro-1-aryl/alkyl ethyl)malonate is described. High yields and simple operations are important features of this methodology.

Published
2015
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3. Synthesis of 1,2,3-Fused Indole Polyheterocycles by Copper-Catalyzed Cascade Reaction

Author

Ching Fa Yao, Zonghan Yang, Veerababurao Kavala, Ashok Konala, Jian Yao Ruan, Chun Wei Kuo, and Tang Hao Yang

Subjects
Indole test, Cascade reaction, 010405 organic chemistry, Chemistry, Organic Chemistry, Copper catalyzed, chemistry.chemical_element, Physical and Theoretical Chemistry, 010402 general chemistry, 01 natural sciences, Copper, Combinatorial chemistry, 0104 chemical sciences
Published
2018

4. Regioselective switching approach for the synthesis of α and δ carboline derivatives

Author

Ashok Konala, Ching Fa Yao, Chun Wei Kuo, Tang Hao Yang, Veerababurao Kavala, and Chia Yu Huang

Subjects
010405 organic chemistry, Metals and Alloys, Regioselectivity, General Chemistry, 010402 general chemistry, Oxime, 01 natural sciences, Catalysis, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, chemistry.chemical_compound, chemistry, Materials Chemistry, Ceramics and Composites, Organic chemistry
Abstract

A metal-free protocol for accessing both α and δ-carboline derivatives, starting from a common indolylchalcone oxime ester precursor is reported. The reaction involves mild conditions and uses a regiodivergent approach. DDQ is used as a switching agent in selectively generating α and δ-carboline derivatives in good to moderate yields.

Published
2017

6. Synthesis of Bicyclic Isoxazoles and Isoxazolines via Intramolecular Nitrile Oxide Cycloaddition

Author

Chun Wei Kuo, Yu Hsuan Shih, Chia Yu Huang, Wen Chang Chen, Tang Hao Yang, Yu Hsuan Wang, Hao Hsiang Chiu, Ching Fa Yao, and Veerababurao Kavala

Subjects
bicyclic isoxazole/isoxazolines, Nitrile, nitroalkane, Pharmaceutical Science, Nitroalkane, Nitric Oxide, Medicinal chemistry, Article, Analytical Chemistry, lcsh:QD241-441, chemistry.chemical_compound, lcsh:Organic chemistry, Drug Discovery, Organic chemistry, Physical and Theoretical Chemistry, Isoxazole, cycloaddition, Alkyl, chemistry.chemical_classification, Cycloaddition Reaction, Bicyclic molecule, Aryl, Yamaguchi reagent, Organic Chemistry, Isoxazoles, Cycloaddition, Malonate, nitrile oxide, chemistry, Chemistry (miscellaneous), Molecular Medicine
Abstract

An efficient and straight forward procedure for the syntheses of bicyclic isoxazole/isoxazoline derivatives from the corresponding dimethyl-2-(2-nitro-1-aryl/alkyl)-2-(prop-2-yn-1yl)malonates or dimethyl 2-allyl-2-(2-nitro-1-aryl/alkyl ethyl)malonate is described. High yields and simple operations are important features of this methodology.

Published
2015

7. Synthesis of benzo[a]carbazole derivatives from 3-ethylindoles by exploiting the dual character of benzoquinone as an oxidizing agent and dienophile

Author

Lyu Lin, Ting Ta Chiang, Ching Fa Yao, Chun Wei Kuo, Chia Yu Huang, Ashok Konala, Veerababurao Kavala, and Tang Hao Yang

Subjects
Diene, 010405 organic chemistry, Carbazole, Metals and Alloys, General Chemistry, 010402 general chemistry, 01 natural sciences, Benzoquinone, Combinatorial chemistry, Catalysis, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, chemistry.chemical_compound, Derivative (finance), chemistry, Oxidizing agent, Materials Chemistry, Ceramics and Composites, Organic chemistry
Abstract

The dual character of benzoquinone is exploited for the synthesis of benzo[a]carbazole derivatives starting from 3-ethylindole derivatives. A diene is generated in situ from the 3-ethylindole derivative with the help of benzoquinone, where it acts as an oxidizing agent. Later it serves as a dienophile and participates in a Diels–Alder reaction with the diene to afford benzo[a]carbazole derivatives.

Published
2016

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