To expand the toolbox for the synthesis of -phenolic sulfilimines, sigmatropic rearrangements were introduced to the field of sulfilimine chemistry. Herein we report a N-H sulfenylation/[2,3]-sigmatropic rearrangement cascade reaction. This mild reaction enables commercially available thiols to serve as the sulfenylation reagent and generates water as the sole byproduct. Moreover, the reaction has a wide substrate scope and can be conducted on a gram scale with excellent reaction efficiency.
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http://dx.doi.org/10.1021/acs.orglett.0c01032 | DOI Listing |
Curr Pharm Des
January 2025
Department of Pharmacy, Delhi Pharmaceutical Sciences and Research University, New Delhi, India.
Background: The metal oxide nanoparticles possess unique properties such as biological compatibility, superior reactivity, and capacity to develop reactive oxygen species, due to this they have drawn significant interest in cancer treatment. The various MONPs such as cerium oxide, Copper oxide, Iron oxide, Titanium dioxide, and Zinc oxide have been investigated for several types of cancers including brain, breast, cervical, colon, leukemia, liver, lung, melanoma, ovarian, and prostate cancers. However, traditional physiochemical synthetic methods for MONPs commonly include toxic materials, a major concern that raises questions regarding their biocompatibility and safety.
View Article and Find Full Text PDFACS Catal
January 2025
Department of Biology and Biotechnology "Lazzaro Spallanzani", University of Pavia, Pavia, Italy 27100.
Redox enzymes, mostly equipped with metal or organic cofactors, can vary their reactivity with oxygen by orders of magnitudes. Understanding how oxygen reactivity is controlled by the protein milieu remains an open issue with broad implications for mechanistic enzymology and enzyme design. Here, we address this problem by focusing on a widespread group of flavoenzymes that oxidize phenolic compounds derived from microbial lignin degradation, using either oxygen or a cytochrome c as electron acceptors.
View Article and Find Full Text PDFR Soc Open Sci
January 2025
Department of Chemistry, SAS, Vellore Institute of Technology, Chennai, Tamil Nadu 600127, India.
Oxidation reactions are vital tools in synthetic organic chemistry. Oxidation of organic species such as alcohols, phenols, aldehydes and ketones provides synthetically valuable organic compounds, especially synthetic intermediates for several biologically active compounds. Some of these synthetic intermediates have shown their synthetic utility in the total synthesis of natural products.
View Article and Find Full Text PDFZhonghua Wei Zhong Bing Ji Jiu Yi Xue
December 2024
Department of Intensive Care Unit, the Affiliated Hospital of Guizhou Medical University, Guiyang 550004, Guizhou, China. Corresponding author: Shen Feng, Email:
Objective: To systematically evaluate the impact of aspirin on the pulmonary inflammatory response in animal models of acute lung injury/acute respiratory distress syndrome (ALI/ARDS).
Methods: Experimental research on aspirin therapy or prevention of ALI/ARDS in animal models were searched in PubMed, Web of Science, Cochrane library, Embase, China biology medicine, CNKI, Wanfang, VIP. The search time limit was from the establishment of the database to July 17, 2023.
Chemistry
January 2025
Shanghai Institute of Organic Chemistry, State Key Laboratory of Organometallic Chemistry, 354 Fenglin Lu,, 200032, Shanghai, CHINA.
The unprecedent gold-catalyzed intermolecular 1,2-difunctionalization of nitriles with aryl iodides via Au(I)/Au(III) redox catalysis has been developed, providing an expedient route to the synthesis of benzoxazoles and benzimidazoles with broad substrate scope and high functional compatibility. Mechanistic investigation reveals that the Au(III)-Ar species generated via oxidative addition of o-iodophenol to MeDalphosAu+, serves as a key intermediate. Particularly and this annulation is initiated by oxidative addition, rather than the nucleophilic attack of the phenol moiety in o-iodophenol towards the nitrile.
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