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Your search keyword '"Tang, Hao-Yang"' showing total 4 results
Start Over Author "Tang, Hao-Yang" Topic 0104 chemical sciences
4 results on '"Tang, Hao-Yang"'

1. 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

2. 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

3. Synthesis of 3-arylindole derivatives from nitroalkane precursors

Author

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

Subjects
Coupling (electronics), Turn (biochemistry), 010405 organic chemistry, Chemistry, General Chemical Engineering, Intramolecular force, Nitroalkane, General Chemistry, Alkylation, 010402 general chemistry, 01 natural sciences, Combinatorial chemistry, 0104 chemical sciences
Abstract

3-Arylindole derivatives were synthesized by Cu(I) catalysed intramolecular Ullmann coupling of 2-bromoarylaminoalkanes. 2-Bromoarylaminoalkanes were synthesized from 2-bromoarylnitroalkanes, which in turn prepared through AlCl3-mediated Friedel–Crafts alkylation of bromo-substituted β-nitrostyrenes and arenes.

Published
2016

4. 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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