Synthesis, metal ion binding, and photochromic properties of benzo- and naphthopyrans annelated by crown ether moieties
作者:Sergey V. Paramonov、Vladimir Lokshin、Artem B. Smolentsev、Evgeni M. Glebov、Valeri V. Korolev、Stepan S. Basok、Konstantin A. Lysenko、Stéphanie Delbaere、Olga A. Fedorova
DOI:10.1016/j.tet.2012.07.029
日期:2012.9
Combining a photochromic chromene with a crown ether moiety results in systems in which photochromism and ionophoric properties could significantly influence each other. In this paper, we report the synthesis of several chromenes annelated by 15(18)-crown-5(6) ethers. The approach involves the building of the photochromic fragment upon the initial crown ether via phenols. The two main routes for chromene
Synthesis of photochromic benzopyrans annulated by 15(18)-crown-5(6) ether
作者:S. V. Paramonov、O. A. Fedorova、V. P. Perevalov、V. Lokshin、V. Khodorkovsky
DOI:10.1007/s11172-008-0339-6
日期:2008.11
The reaction of hydroxy-substituted benzo-15(18)-crown-5(6) ether or benzo-18-crown-6 ether with β-phenylcinnamaldehyde in the presence of titanium tetraethoxide yielded crown-annulated 2,2-diphenylbenzopyrans. The compounds are photochromic, and the spectral characteristics of their colored form are unusual for this class of chromenes.