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High-yielding total synthesis of embelin, rapanone, and irisoquin A, D, F.
Org Biomol Chem
January 2025
Catalysis Laboratory, School of Chemistry, University of Hyderabad, Hyderabad-500 046, India.
Simple and sustainable three- and four-step sequences of di-OH-protection/mono-OMe-deprotection/OrgRC and di-OH-protection/mono-OMe-deprotection/OrgRC/OMe-deprotection protocols were developed to construct biologically active natural products of irisoquin, irisoquin A, irisoquin D, irisoquin F, sorgoleone-364, embelin, rapanone, 5--methylembelin, 5--methylrapanone and their analogues from the commercially available 2,5-dihydroxy-1,4-benzoquinone, aliphatic aldehydes and Hantzsch ester (1,4-DHP) in very good to excellent yields by using organocatalytic reductive coupling (OrgRC) as key reaction. Many of these natural compounds exhibited a broad spectrum of biological activities including antioxidant, anti-inflammatory, anticonvulsant, anxiolytic, analgesic, anthelmintic, antitumor, antibacterial, and antifertility properties. At the same time, simple and readily available 2,5-dihydroxy-1,4-benzoquinone was transformed into a functionally rich library of 2,5-dihydroxy-3,6-dialkyl-1,4-benzoquinones in very good yields by using sequential OrgRC followed by deprotection reactions and resulting natural/unnatural products would be excellent targets for investigation to show their biological activities compared to known natural products.
View Article and Find Full Text PDFWaste marble sludge and calcined clay brick powders in conventional cement farina production for cleaner built environment.
Sci Rep
January 2025
Center for Global Health Research, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India.
In the manufacturing of some sectors, such as marble and brick, certain byproducts, such as sludge, powder, and pieces containing valuable chemical compounds, emerge. Some concrete plants utilize these byproducts as mineralogical additives in Turkey. The objective of the experimental study is to ascertain whether the incorporation of waste from the marble and brick industries, in powder form, into cement manufacturing as a mineralogical additive or substitute is a viable option.
View Article and Find Full Text PDFSite-selective photo-crosslinking for the characterisation of transient ubiquitin-like protein-protein interactions.
PLoS One
January 2025
Manchester Cancer Research Centre, Division of Cancer Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, United Kingdom.
Non-covalent protein-protein interactions are one of the most fundamental building blocks in cellular signalling pathways. Despite this, they have been historically hard to identify using conventional methods due to their often weak and transient nature. Using genetic code expansion and incorporation of commercially available unnatural amino acids, we have developed a highly accessible method whereby interactions between biotinylated ubiquitin-like protein (UBL) probes and their binding partners can be stabilised using ultraviolet (UV) light-induced crosslinks.
View Article and Find Full Text PDF[Enzymatic MBH reaction catalyzed by an artificial enzyme designed with the introduction of an unnatural tertiary amine cofactor].
Sheng Wu Gong Cheng Xue Bao
January 2025
School of Life Sciences and Health Engineering, Jiangnan University, Wuxi 214122, Jiangsu, China.
As the chip of synthetic biology, enzymes play a vital role in the bio-manufacturing industry. The development of diverse functional enzymes can provide a rich toolbox for the development of synthetic biology. This article reports the construction of an artificial enzyme with the introduction of a non-natural cofactor.
View Article and Find Full Text PDFSimple Approach to Cosmetic Medial Epicanthoplasty: A Modification of the Skin Redraping Method.
Ann Plast Surg
February 2025
From the ThankYou Plastic Surgery Clinic, Seoul, Republic of Korea.
Background: The medial epicanthal fold is a common ethnic trait in East Asian faces, and there is a significant demand for its correction for cosmetic reasons. Numerous epicanthoplasty techniques have been proposed; however, visible scarring and unnatural canthal shapes have been challenges. This study aimed to introduce a simpler approach for medial epicanthoplasty to address these issues and evaluate its outcomes.
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