Azulene-substituted pyranylium salts. Syntheses and products characterization
作者:Alexandru C. Razus、Liviu Birzan、Claudia Pavel、Oana Lehadus、Andreea Cristina Corbu、Cristian Enache
DOI:10.1002/jhet.5570430423
日期:2006.7
The synthesis of 4-azulene-substituted 2,6-diphenyl- and 2,6-dimethyl-pyranylium salts and 2-azulenesubstituted 4,6-dimethyl-pyranylium salts by nucleophilic substitution at pyranylium moiety with various azulenes was studied. The starting materials for 2,6-diphenyl derivatives were 4 chlorinated pyranyliumsalts. They were obtained by the halogenation with PCl5 of corresponding pyranones and were
Azulene-substituted pyridines and pyridinium salts. Synthesis and structure. 2. Azulene-substituted pyridinium salts
作者:Alexandru C. Razus、Liviu Birzan、Claudia Pavel、Oana Lehadus、Andreea Corbu、Filip Chiraleu、Cristian Enache
DOI:10.1002/jhet.5570440143
日期:2007.1
4-Azulen-1-yl substituted 2,6-dimethyl-and 2,6-diphenyl-pyridinium salts are obtained in yields between 50 % and 100 % in the reaction of corresponding 4-azulen-1-yl-pyranylim salts and various amines. The effects of amine structure and of substitution in the heterocycle or at azulene moieties on the synthesis have been investigated. The uv-vis and NMR spectra of reaction products are examined and