Publications by authors named "Peng-Yu Liang"
Article Synopsis
- Researchers successfully created axially chiral C2-arylquinoline through an asymmetric reaction involving alkynes, using chiral phosphoric acid as a catalyst, achieving high yields and enantioselectivity.
- The study outlines a detailed reaction mechanism divided into key steps: hydrogen transfer, C-N bonding, annulation, and dehydration, with multiple potential pathways for each step.
- Theoretical analyses, including QTAIM and IGMH, clarified the influence of weak intermolecular interactions and provided insights into enantioselectivity, with theoretical calculations aligning well with experimental outcomes.
Article Synopsis
- - The study explores the reaction between sodium (Na) and hydrogen fluoride (HF), which forms sodium fluoride (NaF) and hydrogen gas, highlighting the formation of specific complexes during the reaction process.
- - Detailed mechanisms are investigated, revealing that sodium initially interacts with HF to create a complex, leading to a transition state and subsequent bond formation, ultimately resulting in various complexes involving NaF and HF.
- - Analyses like noncovalent interaction (NCI), quantum theory of atoms in molecules (QTAIM), and natural bond orbital (NBO) are used to understand the interactions within these complexes, enhancing our knowledge of the reactions between sodium and hydrogen fluoride.
Article Synopsis
- - This study examines the polymorphism of 4-phenylamino-benzoic acids (4-PABAs) by synthesizing a series of compounds with different substitution patterns, revealing that some compounds have two forms (solvent-free and solvate) while others have only one. - Crystal structures of the compounds were analyzed using single-crystal X-ray diffraction, showing all solvent-free forms featuring a common acid-acid dimer motif, except for one which exhibited a less common motif. - The research indicates that neither conformational flexibility nor substitution alone, or in combination, causes polymorphism in these 4-PABAs, contrasting with the behavior seen in fenamic acids, and various techniques were used to study intermolecular interactions and thermal properties
The aryl-to-vinyl nickel 1,4-migration (1,4-Ni migration) reaction has been reported for the first time. The generated alkenyl Ni species undergo a reductive coupling reaction with unactivated brominated alkanes affording a series of trisubstituted olefins. This tandem reaction exhibits mild conditions, a broad substrate scope, high regioselectivity, and excellent Z/E stereoselectivity.
View Article and Find Full Text PDFThe annulation reactions of benzoamidyl radicals with alkenes were realized under visible light irradiation with -Ir(ppy) as catalyst and -aminopyridinium salts as benzoamidyl radical precursors. The reaction can deliver two distinct types of products: in the case of vinyl arenes, [3 + 2] annulation product dihydrooxazoles were yielded exclusively; when alkyl-substituted alkenes were used, on the other hand, it afforded [4 + 2] annulation product dihydroisoquinolinones. Factors determining the reaction consequence were elucidated by DFT calculations.
View Article and Find Full Text PDFCymbidium sinense (Jackson ex Andr.) Willd is a perennial terrestrial plant in the orchid family mainly distributed in China, Japan, India and Southeast Asia that occupies a strong position in the flower market due to its bright green leaves and fragrant flowers (Zhang et al. 2013).
View Article and Find Full Text PDFKB-3 had been reported as a mycorrhizal fungus of , which can promote the seed germination and vegetative growth. Endohyphal bacteria were demonstrated in the hyphae of the KB-3 by 16S rDNA PCR amplification and SYTO-9 fluorescent nucleic acid staining. A strain KE-1 was isolated and identified based on the multilocus sequence analysis.
View Article and Find Full Text PDF