122060-59-7Relevant articles and documents
A Spectrophotometric Study of the Tautomeric Monoanions of (Z)-5-Arylmethylenehydantoins
Tan, Sau-Fun,Ang, Kok-Peng,How, Gee-Fung,Jayachandran, Harilakshmi
, p. 499 - 502 (2007/10/02)
First ionization of (Z)-5-arylmethylenehydantoins in aqueous dimethyl sulphoxide yields a tautomeric mixture of monoanions by deprotonation at N-1 or N-3.By using appropriate 3-methyl and 1-methyl derivatives as models, the equilibrium proportions of the monoanions of the N-substituted compounds have been estimated from the electronic spectra.The percentage of the N-1 anion increases with electron-withdrawing substituents in the benzene ring and with increasing concentration of dimethyl sulphoxide in the solvent mixture.