V. Stefani, A. A. Souto, A. Acuña
1992
Citations
0
Influential Citations
16
Citations
Journal
Dyes and Pigments
Abstract
Abstract The synthesis and efficient purification of the fluorescent dyes 2,5-bis(2'-benzimidazolyl) hydroquinone ( 1 ) and 2,5-bis(2'-benzoxazolyl)hydroquinone ( 1 ) in the quantities needed for laser work are reported. Additionally, simple modifications of these procedures are described for obtaining the corresponding monoheterocyclic compounds 4-(2'-benzimidazolyl)- and 4-(2'-benzoxazolyl)-2,5-dihydroxybenzoic acids 3 and 4 . Methylation and/or acetylation of bisbenzoxazole 2 yielded the respective mono- and disubstituted derivatives which are important model molecules for the photophysical study of the parent dye.