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8 results on '"Guoshu Xie"'

1. Green Synthesis of Aromatic Nitrogen-Containing Heterocycles by Catalytic and Non-Traditional Activation Methods

Author

R. Bernadett Vlocskó, Guoshu Xie, and Béla Török

Subjects
sustainable synthesis, aromatic N-heterocycles, solid acids, nanoparticles, microwaves, ultrasounds, Organic chemistry, QD241-441
Abstract

Recent advances in the environmentally benign synthesis of aromatic N-heterocycles are reviewed, focusing primarily on the application of catalytic methods and non-traditional activation. This account features two main parts: the preparation of single ring N-heterocycles, and their condensed analogs. Both groups include compounds with one, two and more N-atoms. Due to the large number of protocols, this account focuses on providing representative examples to feature the available methods.

Published
2023
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2. Rh-Catalyzed Environmentally Benign Selective Hydrogenation of a Broad Variety of Functional Groups Using Al-Water as a Hydrogen Source

Author

Guoshu Xie and Béla Török

Subjects
hydrogenation, heterogeneous catalysis, green chemistry, Rh-Al/H2O combination, in situ hydrogen formation, aqueous medium, Chemical technology, TP1-1185, Chemistry, QD1-999
Abstract

Supported rhodium catalysts were screened to catalyze the one-step hydrogenation of a broad variety of functional groups. The results show that 5% Rh/Al2O3 and 5% Rh/C performed well in controlling selective hydrogenation under the desired amount of time and temperature. In this regard, partial and full hydrogenation were achieved by controlling reaction time or temperature. In addition to aliphatic C–C, C–N, C–O, and N–O multiple bonds, the applicability of this method was demonstrated by the hydrogenation of C=C double bonds of arenes, which is considered challenging. Importantly, the Al-H2O system producing hydrogen in situ and the high, controllable selectivity make this protocol environmentally benign and highly efficient.

Published
2022
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3. List of contributors

Author

Anderson Alles de Jesus, Sinem Apaydın, Paulo Jardel Leite Araujo, Andrea Baier, Dóra Bogdán, Vivek Bulbule, Berkeley W. Cue, David Daggett, Brunno Ferreira dos Santos, Jennifer L. Freeman, Aravindhan Ganesan, Debanjana Ghosh, Gergo Ignacz, null Indu, Subha Kalyaanamoorthy, Levente Kárpáti, Christina Kaucic, Kabiruddin Khan, Arpad Konczol, Aditya Kulkarni, Kashyap Kumar Dubey, Anusha Lakshmi Dharmavathi, Shainaz Landge, István M. Mándity, Scott E. Miller, James A. Noblet, Stanley Opare, Robert Orkenyi, Garima Pandey, Ria Ramoutar, Kunal Roy, Manisha Sharma, Yizhou Shi, Manuela Souza Leite, Senthil Kumar Sugadoss, Gyorgy Szekely, Ryszard Szyszka, Béla Török, Marianna Török, Sunil K. Tripathi, Rita Bernadett Vlocskó, Justine C. Williams, and Guoshu Xie

Published
2022

5. One-pot synthesis of tetrahydro-pyrrolobenzodiazepines and tetrahydro-pyrrolobenzodiazepinones through sequential 1,3-dipolar cycloaddition/N-alkylation (N-acylation)/Staudinger/aza-Wittig reactions

Author

Xiaoming Ma, John Mark Awad, Weiqi Qiu, Wei Zhang, Guoshu Xie, and Xiaofeng Zhang

Subjects
010405 organic chemistry, Chemistry, One-pot synthesis, Alkylation, 010402 general chemistry, 01 natural sciences, Pollution, Cycloaddition, 0104 chemical sciences, N acylation, Wittig reaction, 1,3-Dipolar cycloaddition, Environmental Chemistry, Organic chemistry, Green chemistry metrics
Abstract

A new synthetic method for diastereoselective synthesis of tetrahydro-pyrrolo[1,2-d][1,4]benzodiazepines and tetrahydro-pyrrolo[1,2-d][1,4]diazepinones is developed which involves 1,3-dipolar cycloaddition, N-alkylation or N-acylation and Staudinger/aza-Wittig reactions. This one-pot and three-step synthesis of four components gave two different heterocyclic scaffolds. Green chemistry metrics analysis of the reaction process provided favorable results.

Published
2019

6. Recent Advances in the Green Synthesis of Heterocycles: From Building Blocks to Biologically Active Compounds

Author

Bernadett Vlocskó, Guoshu Xie, Béla Török, Christian Schäfer, and Hyejin Cho

Subjects
High interest, Chemistry, Heterocyclic Compounds, Organic Chemistry, Humans, Nanotechnology, Green Chemistry Technology, Biochemistry
Abstract

Recent advances in the environmentally benign synthesis of common heterocycles are described. This account features three main parts; the preparation of non-aromatic heterocycles, one-ring aromatic heterocycles and their condensed analogs. Due to the great variety of and high interest in these compounds, this work focuses on providing representative examples of the preparation of the target compounds.

Published
2021

7. Sequential decarboxylative [3+2] cycloaddition and Staudinger/aza-Wittig reactions for diastereoselective synthesis of tetrahydro-pyrroloquinazolines and tetrahedro-pyrrolobenzodiazepines

Author

Rachel E. Muriph, Guoshu Xie, John Mark Awad, Xiaoming Ma, Wei Zhang, Xiaofeng Zhang, and Weiqi Qiu

Subjects
010405 organic chemistry, Chemistry, Organic Chemistry, Drug Discovery, Wittig reaction, 010402 general chemistry, 01 natural sciences, Biochemistry, Medicinal chemistry, Cycloaddition, 0104 chemical sciences
Abstract

A method for diastereoselective synthesis of tetrahydro-pyrroloquinazolines and tetrahydro-pyrrolobenzodiazepines is developed through sequential reactions including decarboxylative 1,3-dipolar cycloaddition of non-stabilized azomethine ylides, N-acylation or N-alkylation, and the Staudinger/aza-Wittig reactions.

Published
2020

8. One-pot diastereoselective synthesis of tetrahydroepimino-benzo[b]azocines through sequential [3+2]-cycloaddition and Staudinger-aza-Wittig reactions

Author

Xiaofeng Zhang, Xiaoming Ma, Wei Zhang, John Mark Awad, and Guoshu Xie

Subjects
010405 organic chemistry, Stereochemistry, Chemistry, Organic Chemistry, 010402 general chemistry, 01 natural sciences, Biochemistry, Cycloaddition, 0104 chemical sciences, Reaction sequence, Intramolecular force, Drug Discovery, Wittig reaction, Molecule
Abstract

The one-pot synthesis of tetrahydro-epiminobenzo[b]azocines through a sequential 1,3-dipolar cycloaddition and intramolecular Staudinger-aza-Wittig reaction sequence is reported. This methodology provides a new and efficient approach for medium-sized and bridged nitrogen heterocyclic molecules.

Published
2019

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