98%
921
2 minutes
20
The complex Ru(TPP)(NAr)(2) inserts a nitrene group into allylic and benzylic C-H bonds and is the key intermediate in the ruthenium porphyrin-catalyzed amination of hydrocarbons by aryl azides.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1039/b903238j | DOI Listing |
Top Curr Chem (Cham)
September 2025
Department of Organic Chemistry I, Faculty of Pharmacy and Lascaray Research Center, University of the Basque Country (UPV/EHU), Paseo de La Universidad 7, 01006, Vitoria-Gasteiz, Spain.
Aziridines, structurally related to epoxides, are among the most challenging and fascinating heterocycles in organic chemistry due to their increasing applications in asymmetric synthesis, medicinal chemistry, and materials science. These three-membered nitrogen-containing rings serve as key intermediates in the synthesis of chiral amines, complex molecules, and pharmaceutically relevant compounds. This review provides an overview of recent progress in catalytic asymmetric aziridination, focusing on novel methodologies, an analysis of the scope and limitations of each approach, and mechanistic insights.
View Article and Find Full Text PDFOrg Lett
September 2025
Guangdong Basic Research Center of Excellence for Aggregate Science, School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, China.
The polymerization mechanism and the identification of key oligomer intermediates during the thermal condensation of benzoguanamine (BG) remain unclear. Herein, we report a novel mixed thermal condensation strategy using BG and a pre-synthesized dimer to selectively synthesize the trimer (BG) with a significantly enhanced yield. Comprehensive characterization techniques confirm the formation of a linear molecular structure for (BG).
View Article and Find Full Text PDFOrg Lett
September 2025
Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Wushan Rd-381, Guangzhou 510641, P.R. China.
Herein, we report the first regio- and enantioselective synthesis of tetrahydropyrido[2,3-]pyrazines using a chiral iridacycle catalyst. Pyridyl diamines and diketones undergo sequential annulation and asymmetric transfer hydrogenation of the generated pyrido[2,3-]pyrazine intermediates. This method provides diverse fused N-heterocycles in high yields (up to 95%) and enantioselectivity (98.
View Article and Find Full Text PDFJ Org Chem
September 2025
State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.
The first dearomative allylation of -(trialkylsilyl) benzyl chlorides with allyltributylstannane via RSi-Pd-π-benzyl intermediates is described. The reactions proceeded smoothly in the presence of a specific P,N hemilabile ligand to generate vinylsilanes bearing an allyl group in satisfactory to good yields. Systematic evaluation of phosphine ligands identified ESPmin and % Vbur (min) as key parameters correlating ligand structure with catalytic activity.
View Article and Find Full Text PDFEnviron Sci Technol
September 2025
Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, Liaoning 110016, P.R. China.
Ambroxol (AMB), a common expectorant, enters aquatic environments via wastewater, yet its ecological risks remain unclear. Under UV exposure (15 mJ·cm, λ = 185-400 nm), AMB undergoes photolysis, among the photoproducts, 4-((2-amino-3-bromobenzyl)amino) cyclohexanol (P1) and 2-amino-3,5-dibromobenzaldehyde (DBA) are major species, comprising over 50% of the total photoproduct peak area at the photolytic plateau. Acute toxicity tests with AMB, P1, and DBA in four aquatic species at different trophic levels revealed: the highest sensitivity in (LC = 0.
View Article and Find Full Text PDF