β- and γ-Amino alcohols are among the most significant structural motifs in pharmacologically active molecules and pharmaceuticals. Herein, a protocol for the construction of β- and γ-amino alcohols reductive amination and transfer hydrogenation of diketones with aromatic amines is described. This reaction is performed by utilizing iridium complexes as catalysts and HCOH as a hydrogen donor to deliver a library of β- and γ-amino alcohols under mild and operationally simple conditions. Successful scale-up performance was also conducted under standard conditions.
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http://dx.doi.org/10.1039/d4ra07386j | DOI Listing |
Molecules
November 2024
Institute of Physics, University of Rzeszów, 35-310 Rzeszów, Poland.
The main purpose of this study is to characterize the nature of the low-energy singlet excited states of the anthranilic acid homodimer (AA) and their changes (symmetry breaking) caused by deformation of the centrosymmetric, ground state structure of AA towards the geometry of the S state. We employ both the correlated ab initio methods (approximate Coupled Clusters Singles and Doubles-CC2 and CASSCF/NEVPT2) as well as the DFT/TDDFT calculations with two exchange-correlation functionals, i.e.
View Article and Find Full Text PDFAnimals (Basel)
November 2024
College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China.
Sheep facial expressions are valuable indicators of their pain levels, playing a critical role in monitoring their health and welfare. In response to challenges such as missed detections, false positives, and low recognition accuracy in sheep facial expression recognition, this paper introduces an enhanced algorithm based on YOLOv8n, referred to as SimAM-MobileViTAttention-EfficiCIoU-AA2_SPPF-YOLOv8n (SMEA-YOLOv8n). Firstly, the proposed method integrates the parameter-free Similarity-Aware Attention Mechanism (SimAM) and MobileViTAttention modules into the CSP Bottleneck with 2 Convolutions(C2f) module of the neck network, aiming to enhance the model's feature representation and fusion capabilities in complex environments while mitigating the interference of irrelevant background features.
View Article and Find Full Text PDFSmall
December 2024
Department of Physics, Incheon National University, Incheon, 22012, South Korea.
The concept of non-trivial electronic structure combined with reduced dimensionality presents a promising strategy for advancing optical applications and energy harvesting technologies. Symmetry breaking in low dimensional system enables the emergence of non-linear optical responses, which are greatly amplified by the singular points of band inversion. Here, using first-principles calculations, the significant enhancement of the shift current in Bi nanotubes is investigated, driven by the combined effects of 1D geometry and non-trivial band order.
View Article and Find Full Text PDFJ Am Acad Dermatol
October 2024
Dermatology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy; Department of Experimental, Diagnostic and Specialty Medicine Alma Mater Studiorum, University of Bologna, Bologna, Italy.
Background: Baricitinib, an oral selective Janus kinase inhibitor, is approved to treat adults with severe alopecia areata (AA).
Objective: To report the week 152 efficacy results from the phase 3 trial BRAVE-AA2 down-titration substudy.
Methods: BRAVE-AA2 enrolled 546 adults with severe AA (Severity of Alopecia Tool [SALT] score ≥50).
J Eur Acad Dermatol Venereol
October 2024
Clifton Insight, Bristol, UK.
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