A Rh-catalyst system based on the asymmetric ligand (t)Bu2PCH2P(o-C6H4OMe)2 is reported that allows for the hydroacylation of challenging internal alkenes with β-substituted aldehydes. Mechanistic studies point to the stabilizing role of both excess alkene and the OMe-group.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4531818 | PMC |
http://dx.doi.org/10.1002/anie.201503208 | DOI Listing |
Chem Sci
December 2024
Department of Chemistry, The Scripps Research Institute 10550N. Torrey Pines Road, La Jolla CA 92037 USA
Catalytic alkene isomerization is a powerful synthetic strategy for preparing valuable internal alkenes from simple feedstocks. The utility of olefin isomerization hinges on the ability to control both positional and stereoisomerism to access a single product among numerous potential isomers. Within base-metal catalysis, relatively little is known about how to modulate reactivity and selectivity with group 6 metal-catalyzed isomerization.
View Article and Find Full Text PDFACS Catal
April 2024
Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States.
BMC Oral Health
December 2024
Faculty of Odonto-Stomatology, University of Health Sciences, Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam.
Background: The success of a restoration largely depends on the quality of its fit. This study aimed to investigate the fit quality of monolithic zirconia veneers (MZVs) produced through traditional and digital workflows.
Methods: A typodont maxillary right central incisor was prepared.
J Org Chem
January 2025
Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi 563003, P. R. China.
A convenient electrochemical oxidative cascade cyclization of alkenes equipped with pendant alcohols with general nucleophiles was developed. Using readily available diarylmethanimine and carboxylic acids as nucleophilic sources, a broad range of internal alkene and terminal alkene substrates could produce RCO- and ArCN-functionalized -heterocycles in moderate to high yields without the requirement for external oxidants and metals. These resulting products can subsequently be hydrolyzed to yield valuable NH- and OH-functionalized tetrahydrofurans and tetrahydropyranes under mild conditions.
View Article and Find Full Text PDFBMC Gastroenterol
December 2024
Department of Emergency Medicine, Zibo Central Hospital, No. 54 Gongqingtuan West Road, Zhangdian District, Zibo, 255036, P.R. China.
Background: Metabolic dysfunction-associated fatty liver disease (MAFLD) is a typical hepatic steatosis with metabolic dysfunction. The composite dietary antioxidant index (CDAI) measures individual antioxidant capacity, and the relationship with MAFLD has received little attention. Our goal is to explore the association of CDAI with MAFLD.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!