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Gold/silver-catalyzed synthesis of functionalized indoles from -allyl-2-alkynylanilines and α-diazo compounds 1,3-allyl migration.
Chem Commun (Camb)
March 2025
Department of Chemistry, University of Delhi, Delhi 110007, India.
Gold-catalyzed synthesis of decorated indoles has been developed through carbene insertion into N-H bonds of -allyl-2-(aryl/alkyl ethynyl)anilines using α-diazo compounds followed by cyclization and concomitant 1,3 migration of allyl fragments. The developed protocol tackles the inherited challenge of direct C3 functionalization and eliminates the need for a tertiary aniline precursor for the 1,3-migration reaction. The applicability of this transformation is showcased through the practical synthesis of analogs of small drug-like and pharmaceutically relevant molecules such as ibuprofen, estradiol, menthol, and borneol, The mechanism is well supported by control experiments and isolation of the reaction intermediate.
View Article and Find Full Text PDFA well-defined phosphine-free metal-ligand cooperative route for -alkylation of aromatic amines activation of renewable alcohols catalyzed by NNN pincer cobalt(II) complexes.
Dalton Trans
March 2025
Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
This study presents the direct -alkylation of aromatic amines using greener primary alcohols as alkyl donors, catalyzed by base metal-derived Co(II) catalysts the borrowing hydrogen (BH) method. Two well-defined phosphine-free NNN-type pincer ligands (L1 and L2) were synthesized and utilized to prepare cobalt(II) catalysts C1 and C2. The catalysts were well characterized by UV-vis, IR, HRMS, and single-crystal X-ray diffraction studies.
View Article and Find Full Text PDFTetramethylurea Based Intermediate Phase Engineering for Efficient and Stable Perovskite Solar Cells.
Small
March 2025
Institute for Clean Energy and Advanced Materials, School of Materials and Energy, Southwest University, Chongqing, 400715, P. R. China.
Perovskite solar cells (PSCs) are emerging photovoltaic devices renowned for their high efficiency and low cost. Efficient and stable PSCs depend on high-quality perovskite films, which are strongly influenced by the excellent nucleation and growth. The choice of solvent is critical for the crystallization behavior of perovskite films.
View Article and Find Full Text PDFLayered-Hierarchical Dual-Lattice Strain Suppresses NiSe Surface Reconstruction for Stable OER in Alkaline Fresh/Seawater Splitting.
Small
March 2025
College of Materials Science and Engineering, Hunan Joint International Laboratory of Advanced Materials and Technology for Clean Energy, Hunan University, Changsha, 410082, P. R. China.
Transition metal selenides (TMSe) are promising oxygen evolution reaction (OER) electrocatalysts but act as precursors rather than the actual active phase, transforming into amorphous oxyhydroxides during OER. This transformation, along with the formation of selenium oxyanions and unstable heterointerfaces, complicates the structure-activity relationship and reduces stability. This work introduces novel "layered-hierarchical dual lattice strain engineering" to inhibit the surface reconstruction of NiSe by modulating both the nickel foam (NF) substrate with MoN nanosheets (NM) and the NiSe nanorods-nanosheets catalytic layer (NiSe-NiSe-NiO, NSN) with ultrafast interfacial bimetallic amorphous NiFeOOH coating, achieving the optimized NM/NSN/NiFeOOH configuration.
View Article and Find Full Text PDFMycoplasma spp. in Passeriformes in Germany.
J Wildl Dis
March 2025
Clinic for Birds, Reptiles, Amphibians and Fish, Justus-Liebig-University Giessen, Frankfurter Str. 114, 35392 Giessen, Germany.
Little is known about the significance of mycoplasmas in different free-ranging bird species. One hypothesis is that the prevalence of mycoplasmas and the influence of vocalization on reproduction are evolutionarily linked. To add another piece of information toward proving or disproving this hypothesis and obtain more information about the clinical relevance of mycoplasmas, choanal swabs from different passerine species presented to a veterinary clinic were examined for mycoplasmas using culture and Mycoplasma genus-specific PCR.
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