A strategy toward tetrapetalones was explored including a site-selective ethylenation of the silyl enol ether A to afford a quaternary stereocenter that serves in a stereogenic capacity. Regio- and diastereoselective reactions were observed in conjunction with the oxidative formation of cation B, which included subsequent selective formation of either carbon-oxygen or carbon-carbon bonds at the δ or ζ position on the seven-membered ring. The fourth ring was formed using a Stetter reaction.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.orglett.7b03500 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Pectin/gelatin-based bionanocomposite containing modified graphene quantum dots and carnauba wax as functional fillers for food packaging applications.
J Food Sci
January 2025
Nutrition Research Center, Department of Food Science and Technology, Faculty of Nutrition and Food Sciences, Tabriz University of Medical Sciences, Tabriz, Iran.
Alternatives to nonbiodegradable synthetic plastics for food packaging include films made from biopolymers that are nontoxic and environment-friendly. In this study, carnauba wax (CW) and nitrogen-doped graphene quantum dots (NG) as functional additives were utilized in the production of pectin/gelatin (PG) film. NG was synthesized through the microwave method, using acetic acid as the carbon source, giving size, and zeta potential of 1.
View Article and Find Full Text PDFAdvances in waste-derived functional materials for PFAS remediation.
Biodegradation
January 2025
Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Jakarta, Rawamangun, Jakarta Timur, Indonesia.
Per- and polyfluoroalkyl substances (PFAS) are synthetic organofluoride compounds, widely used in industries since the 1950s for their hydrophobic properties. PFAS contamination of soil and water poses significant environmental and public health risks due to their persistence, chemical stability, and resistance to degradation. The Chemical Abstracts Service catalogs approximately 4300 PFAS globally.
View Article and Find Full Text PDFTherapeutic potential of 4-hexylresorcinol in reducing sarcopenia in diabetic masseter muscle.
Maxillofac Plast Reconstr Surg
January 2025
Gangneung-Wonju National University KR, Gangneung-si, Gangwon-do, Republic of Korea.
Background: This study aimed to evaluate the effects of 4-hexylresorcinol (4HR), a synthetic compound with antioxidant and stress-modulating properties, on diabetic sarcopenia in the masseter muscle.
Methods: A controlled, parallel-arm study was conducted using 38 Sprague-Dawley rats divided into diabetic and non-diabetic groups. Diabetes was induced with streptozotocin (STZ), and the groups were further subdivided to receive weekly subcutaneous injections of either 4HR or saline.
Synthesis and evaluation of the antifungal and antibiofilm potential of aminochalcones.
Arch Microbiol
January 2025
Department of Chemistryand Environmental Sciences, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University Júlio de Mesquita Filho, São José do Rio Preto, SP, Brazil.
Candida is a commensal fungus of clinical interest that commonly lives in oral cavity and intestine but can become an opportunist microrganism and cause severe infections. A serie of 10 aminochalcones were designed and synthetized to obtain compounds anti-Candida with potent and broad-spectrum activity. The most active compound J34 demonstrated excellent in vitro activity against Candida albicans, Candida tropicalis, Candida parapsilosis, Candida glabrata and Candida krusei with minimum inhibitory concentration between 1.
View Article and Find Full Text PDFPotential Degradation of Low- and High-Density Polyethylene Films by Ochrobactrum intermedium SA1 from Sewage Sludge.
Bull Environ Contam Toxicol
January 2025
Department of Microbiology, Faculty of Allied Health Sciences, Shree Guru Gobind Singh Tricentenary (SGT) University, Gurugram, Haryana, 122505, India.
Accumulation of plastic waste is an alarming environmental concern across globe. For which, microbial degradation offers an efficient ecofriendly solution. Thus, the present study focuses on the exploration of new bacterium that can grow on and utilize polyethylene.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!