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3 results on '"Yangchun Wu"'

1. Straightforward Acid-Catalyzed Synthesis of Pyrrolyldipyrromethenes

Author

Changjiang Yu, Gaosheng Yang, Jun Wang, Xujun Tan, Erhong Hao, Yajun Xu, Zhaoyun Wang, Lijuan Jiao, and Yangchun Wu

Subjects
Models, Molecular, Indole test, Molecular Structure, Chemistry, Protonation, Homogeneous catalysis, General Medicine, General Chemistry, Phosphorus Compounds, Electrophilic aromatic substitution, Crystallography, X-Ray, Catalysis, chemistry.chemical_compound, Nucleophilic aromatic substitution, Acid catalyzed, Organic chemistry, Pyrroles, Isoindole, Pyrrole
Abstract

Three for one: Pyrrolyldipyrromethenes having different functional groups were efficiently synthesized from POCl(3)-promoted condensations between 5-chloro-2-formylpyrrole or isoindole derivatives and suitable pyrrole or indole fragments through a novel nucleophilic aromatic substitution of the initially formed protonated azafulvene rings.

Published
2012

2. α-/β-Formylated Boron-Dipyrrin (BODIPY) Dyes: Regioselective Syntheses and Photophysical Properties

Author

Hao Yin, Zhaoyun Wang, Jinyuan Zhou, Changjiang Yu, Erhong Hao, Weidong Pang, Lijuan Jiao, Yangchun Wu, and Gaosheng Yang

Subjects
chemistry.chemical_compound, chemistry, Organic Chemistry, Regioselectivity, chemistry.chemical_element, Physical and Theoretical Chemistry, BODIPY, Chromophore, Photochemistry, Boron, Fluorescence, Electronic properties, Formylation
Abstract

Formylation has been performed on pyrrole-unsubstituted dipyrromethanes 1 and boron–dipyrrin (BODIPY) dyes 4 based on a Vilsmeier–Haack reaction. It is highly regioselective and complementary and occurs exclusively at the α- and β-position, respectively, for pyrrole-unsubstituted dipyrromethanes 1 and BODIPY dyes 4. This regioselective formylation enables the syntheses of a variety of α- and β-substituted BODIPY dyes. The installation of formyl groups affects the electronic properties of the BODIPY chromophore, resulting in red- and blueshifts of the absorption and emission maxima, respectively, for the α- and β-formylatedBODIPYs 3 and 5.

Published
2011

3. ChemInform Abstract: Straightforward Acid-Catalyzed Synthesis of Pyrrolyldipyrromethenes

Author

Jun Wang, Changjiang Yu, Xujun Tan, Lijuan Jiao, Yangchun Wu, Zhaoyun Wang, Yajun Xu, Gaosheng Yang, and Erhong Hao

Subjects
Isoindoles, Chemistry, Acid catalyzed, General Medicine, Combinatorial chemistry, Pyrrole derivatives
Abstract

One- and two-step reactions for the construction of the target compounds from halo(acetyl)-substituted pyrroles or isoindoles and pyrroles are given.

Published
2013

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