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-Hydroxylated cores are ubiquitous in natural products. Herein, we disclose the first template assisted hydroxylation reaction. Experimental and studies helped us to gain valuable mechanistic insights, including the role of the hexafluoroisopropanol (HFIP) solvent, during C-H hydroxylation. The reactive intermediates, prior to the C-H activation, have been detected by spectroscopic techniques. Additionally, the C-O bond formation has been extended to -acetoxylation. The preparation of a phase II quinone reductase activity inducer and a resveratrol precursor illustrated the synthetic significance of the present strategy.
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http://dx.doi.org/10.1039/c5sc04060d | DOI Listing |
Eur J Cancer
February 2025
Department of Oncology, St. Jude Children's Research Hospital, 262 Danny Thomas Pl, Memphis, TN 38105, USA. Electronic address:
Background: Entrectinib, a central nervous system (CNS)-penetrant TRK/ROS1 inhibitor, has demonstrated clinical activity in children with NTRK1/2/3 or ROS1 fusion-positive extracranial solid and CNS tumours. We present integrated data of entrectinib in children with NTRK or ROS1 fusion-positive tumours from the STARTRK-NG, TAPISTRY, and STARTRK-2 trials.
Methods: Efficacy analyses were undertaken on TRK/ROS1 inhibitor-naïve patients aged <18 years with metastatic/locally advanced NTRK1/2/3 or ROS1 fusion-positive extracranial solid or CNS tumours who received ≥1 entrectinib dose and had ≥6 months of follow-up from enrolment.
J Org Chem
March 2025
College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China.
An efficient Rh(III)-catalyzed annulation between 3-aryl-2-benzo[][1,4]oxazines and α-diazo-β-ketoesters was developed, affording a series of polycyclic heteroarenes in moderate to excellent yields with good functional group compatibility. The procedure featured high efficiency, redox neutrality, twofold -C-H activation, and dual [4 + 2] annulation. Moreover, several important intermediates and products have been isolated as powerful evidence for the proposed reaction mechanism.
View Article and Find Full Text PDFAzidoalkyation is an efficient strategy for the conversion of unsaturated precursors into nitrogen-containing structural motifs. Herein, we describe a convenient and highly regioselective iron-catalyzed 1,2-azidoalkylation of 1,3-dienes that employs TMSN as a coupling partner with hydrocarbons that bear diverse C-H bonds. This chemistry is achieved through the direct functionalization of strong C(sp)-H bonds and is facilitated by a combination of hydrogen atom transfer (HAT) and iron catalysis.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
March 2025
East China University of Science and Technology, Key Lab for Advanced Materials and Institute of Fine Chemical, 130 Meilong Road, 200237, Shanghai, CHINA.
Direct chemical conversion of plastic waste into low-carbon oxygenates, rather than carbon dioxide, with renewable energy, is important yet challenging. Due to the high C-X (X = C, H, N) bond energy, fully optimized catalysts are required to enable precise bond cleavage for boosted efficiency and selectivity. Here, we report adaptable and recyclable molybdenum peroxide photocatalysts that demonstrate chemical scissors for the selective conversion of polyamide to alcohol.
View Article and Find Full Text PDFBMC Emerg Med
March 2025
Department of Emergency and Critical Care Medicine, Keio University School of Medicine, Tokyo, Japan.
Background: Extracorporeal membrane oxygenation (ECMO) indications in patients with accidental hypothermia (AH) and hemodynamic instability before cardiac arrest (CA) are unclear. We aimed to identify a subgroup of these patients who would benefit from ECMO rewarming.
Methods: This study was a post-hoc analysis of the ICE-CRASH study (2019-2022), a prospective, multicenter, observational study throughout Japan.
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