Synthesis of new 2,7-dibromo 9-benzocyclobuten-3-yl-9H-fluorene derivatives - perspective dielectric materials for electronics

Abstract

Abstract The approaches to the synthesis of new derivatives of 2-7-dibromofluorene and benzocyclobutene have been investigated. For this purpose 9-bicyclo [4.2.0] octa-1 (6), 2,4- trien-3-yl-2,7-dibromo-9H-fluoren-9-ol was synthesized by reaction of 2,7-dibromo-fluoren -9- one with 3-benzocyclobutene magnesium bromide. The possibility of reduction and substitution of the hydroxyl group at position 9 of the obtained compound with aromatic substituents under conditions of acid catalysis is demonstrated. Target compounds were obtained in yields from 75 to 90%.