In the title compound, C22H24N4O4S, the central pyrimidine ring adopts a sofa conformation with the ring-junction N atom displaced by 0.2358 (6) Å from the mean plane of the remaining ring atoms. The 3-meth-oxy-phenyl ring, at the chiral C atom opposite the other N atom, is positioned axially and is inclined to the thia-zolo-pyrimidine ring with a dihedral angle of 83.88 (7)°. The thia-zole ring is essentially planar (r.m.s. deviation = 0.0034 Å). In the crystal, pairs of weak C-H⋯O hydrogen bonds link mol-ecules related by twofold rotation axes to form R 2 (2)(8) rings, which in turn are linked by weak C-H⋯N inter-actions, forming ribbons along [-110]. In addition, π-π stacking inter-actions [centroid-centroid distance = 3.5744 (15) Å] connect the ribbons, forming slabs lying parallel to (001).
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http://dx.doi.org/10.1107/S2056989015005241 | DOI Listing |
Discov Nano
January 2025
Institute of Medical Research, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, 710072, Shaanxi, China.
Human lens epithelial cells (hLECs) are critical for lens transparency, and their aberrant metabolic activity and gene expression can lead to cataract. Intracellular delivery to hLECs, especially to sub-cellular organelles (e.g.
View Article and Find Full Text PDFJ Phys Chem Lett
January 2025
SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Environmental Theoretical Chemistry, School of Environment, South China Normal University, Guangzhou 510006, China.
Two-dimensional (2D) electronic spectra of the phenylene ethynylene dendrimer with 2-ring and 3-ring branches were evaluated by combining the on-the-fly trajectory surface hopping nonadiabatic dynamics and the doorway-window simulation protocol. The ground state bleach (GSB), stimulated emission (SE), and excited-state absorption (ESA) contributions to the 2D signal were obtained and carefully analyzed. The results demonstrate that the ultrafast intramolecular nonadiabatic excited-state energy transfer (EET) from the 2-ring to the 3-ring units is comprehensively characterized by the SE and ESA signals.
View Article and Find Full Text PDFInt J Gynaecol Obstet
January 2025
Department of Obstetrics and Gynecology, Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey.
Objective: Hysteroscopic myomectomy is widely regarded as safe and feasible, although achieving single-session results for larger myomas often requires alternative methods. This study introduces a novel approach: ultrasound-guided myoma extirpation using ring forceps combined with hysteroscopy.
Methods: This retrospective, single-center study includes patients who underwent ultrasound-guided myoma extirpation between 2016 and 2024.
J Org Chem
January 2025
School of Pharmacy, Hangzhou Medical College, 8 Yikang Road, Hangzhou 311300, PR China.
A Fe-catalyzed hydrocyclization reaction of unactivated alkenes was developed, utilizing PhSiH as the hydrogen source, yielding 2,3-dihydroquinazolinone (DHQZ) derivatives in moderate to good yields. Notably, when the substrate was switched to -cyano--(2-(prop-1-en-2-yl)phenyl)benzamides, the reaction yielded only the unreduced products. Mechanistic studies revealed that the intramolecular addition of the in situ formed radical to the unactivated alkene results in the formation of the fused ring.
View Article and Find Full Text PDFJ Chem Phys
January 2025
Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria.
Thiazole derivatives are biologically relevant molecules, used also in pharmaceutical applications. Herein, we report results for electron attachment to 2-bromo-5-nitrothiazole (BNT) in the gas phase. Employing two crossed electron-molecule beam experiments, we determined the efficiency curves of various fragment anions as a function of the initial electron energy between about 0 and 10 eV as well as the emission angle and kinetic energy distributions of Br- and NO2- ions formed from a resonance near 4 eV.
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