Polynuclear heterocyclic systems based on naphthalene-1,5-diol: I. Reaction of naphthalene-1,5-diol and its derivatives with β-dicarbonyl and α,β-unsaturated carbonyl compounds
作者:V. V. Mezheritskii、R. V. Tyurin、L. G. Minyaeva、A. N. Antonov、A. P. Zadorozhnaya
DOI:10.1134/s1070428006100095
日期:2006.10
Reactions of naphthalene-1,5-diol and its derivatives (5-methoxynaphthalen-1-ol, 2-bromo-5-methoxynaphthalen-1-ol, and 2,6-di-tert-butylnaphthalene-1,5-diol) with ethyl acetoacetate, acetylacetone, and p-methoxycinnamic acid under acidic conditions (HCl, HClO4, CF3CO2H) gave substituted benzo[h]-chromenes, naphtho[1,2-b]pyrylium salts, and 3,4-dihydrobenzo[h]chromenes, respectively. Possible mechanisms were proposed for the observed acid-catalyzed heterocyclizations.