Studies on Regioselectivity of Nitration of Coumarins with Cerium(IV) Ammonium Nitrate: Solid-State Nitration of 6-Hydroxy-Coumarins on Montmorillonite K-10 Clay Support Under Microwave Irradiation
作者:Nemai C. Ganguly、Mrityunjoy Datta、Prithwiraj De、Romaprosad Chakravarty
DOI:10.1081/scc-120015821
日期:2003.1.4
in acetic acid and acetonitrile in acceptable-to-excellent yields. Acetonitrile was found to be a better solvent for regioselective nitration than acetic acid. Use of CAN on montmorilloniteK-10 clay under microwaveirradiation for expeditious solvent-free regioselective nitration has been revealed for the first time.
Spectral properties and modeling of knightletin, a novel aminocoumarin with intramolecular hydrogen bonding
作者:Leah H. Knoor、Liam P. Hoogewerf、Isaac B. Jonker、Elizabeth A. Doty、George R. Du Laney、Ronald L. Blankespoor、Mark A. Muyskens
DOI:10.1016/j.jphotochem.2022.114286
日期:2023.2
vicinal hydroxyl group on the aminocoumarin structure through its absorbance-fluorescence properties and interaction with several initial solvents. The substitution on the benzene ring of the coumarin affects electronic states, the molecular dipole moment and involves both intramolecular and intermolecular hydrogenbonding. This report describes the synthesis of knightletin, its absorbance-fluorescence characteristics