Molecular Engineering of Benzo[b]pyrylium Salts by Indirect Electrophilic Substitution

Abstract

Benzotriazole-mediated indirect electrophilic substitution in the position para to the oxygen atom of benzo[b]pyrylium salts has been used for the synthesis of long-chain and bifunctional benzo[b]pyrylium species. The methodology has potential for application in high technology and the pharmaceutical industries, for the molecular engineering of new functionalized derivatives.