NCBSI/KI: A Reagent System for Iodination of Aromatics through <i>In Situ</i> Generation of I-Cl
作者:Amey Palav、Balu Misal、Ganesh Chaturbhuj
DOI:10.1021/acs.joc.1c01642
日期:2021.9.3
monochloride (I-Cl) generation followed by iodination of aromatics using NCBSI/KI system has been developed. The NCBSI reagent requires no activation due to longer bondlength, lower bonddissociationenergy, and higher absolute charge density on nitrogen. The system is adequate for mono- and diiodination of a wide range of moderate to highly activated arenes with good yield and purity. Moreover, the precursor
Bronsted acid active sites on sulfated polyborate under homogenous conditions, we were keen on developing iodination protocol of arenes that can meet the requirement of regioselectivity and higher yield. The sulfated polyborate activates N-iodosuccinimide for mono iodination of highly activated substrates viz. phenols, anilines under anhydrous condition. Water tunes sulfated polyborate to generate more
Aerobic Ru-Catalyzed Epoxidations in Fluorous Biphasic System Using New Fluorous Benzimidazolic Ligands
作者:Paul Knochel、Gianna Ragagnin
DOI:10.1055/s-2004-820042
日期:——
An efficient ruthenium catalyzed fluorous biphasic epoxidation of alkenes with oxygen in the presence of a pyridine-benzimidazole ligand bearing perfluorinated ponytails is described. Excellent yields and reaction rates were obtained and the fluorous phase could be recycled up to ten times without any loss of activity.
A Pronounced Halogen Effect on the Organogelation Properties of Peripherally Halogen Functionalized Poly(benzyl ether) Dendrons
作者:Yu Feng、Hui Chen、Zhi-Xiong Liu、Yan-Mei He、Qing-Hua Fan
DOI:10.1002/chem.201504598
日期:2016.3.24
effect on the organogelation properties of poly(benzyl ether) dendrons is reported. A new class of poly(benzyl ether) dendrons with halo substituents decorating their periphery was synthesized and fully characterized. A systematic study on the gelation abilities, thermotropic behaviors, aggregated microstructures, and mechanical properties of self‐assembled organogels was performed to elucidate the
Koerner; Contardi, Atti della Accademia Nazionale dei Lincei, Classe di Scienze Fisiche, Matematiche e Naturali, Rendiconti, 1906, vol. <5> 15 II, p. 579