Synthesis of new potential UV-filters

Three new silylated 2-(2´-hydroxyphenyl)benzotriazole derivatives were prepared. Starting with the easily available simple 2-(2´-hydroxyphenyl)benzotriazole, the target compounds were synthesized by a stepwise synthetic protocol, namely alkylation, thermal rearrangement and silylation

Rearrangement Reactions for the Synthesis of Some Oxa- and Aza-tricyclic Rings Heterocyclic Compounds

This review article describes the main results of our research during the last 5-6 years. A series of new rearrangement reactions was discovered and used for the synthesis of novel heterocyclic compounds: furo[2,3-f]isoquinolines, furo[3,2 -f]quinolines, benzo[c]xanthene, benzo[h]chromene, benzo[a]xanthene,  benzo[f]chromene, furo[2,3-f]isoquinoline, spirofuro[3,2-f]quinoline,  cycloalkanoindoles, and benzotriazines

Synthesis of new potential UV-filters

Three new silylated 2-(2´-hydroxyphenyl)benzotriazole derivatives were prepared. Starting with the easily available simple 2-(2´-hydroxyphenyl)benzotriazole, the target compounds were synthesized by a stepwise synthetic protocol, namely alkylation, thermal rearrangement and silylation

Rearrangements of Cycloalkenyl Aryl Ethers

Rearrangement reactions of cycloalkenyl phenol and naphthyl ethers and the acid-catalyzed cyclization of the resulting product were investigated. Claisen rearrangement afforded 2-substituted phenol and naphthol derivatives. Combined Claisen and Cope rearrangement resulted in the formation of 4-substituted phenol and naphthol derivatives. In the case of cycloocthylphenyl ether the consecutive Claisen and Cope rearrangements were followed by an alkyl migration. The mechanism of this novel rearrangement reaction is also discussed