Efficient green synthesis of isoindigo derivatives using sulfonic-acid-functionalized nanoporous silica (SBA-Pr-SO3H) catalyst and study of their antimicrobial properties

An efficient green condensation reaction has been developed for synthesis of trans -isoindigo derivatives using SBA-Pr-SO 3 H with pore size of 6 nm as a heterogeneous nanoporous acid catalyst under solvent-free conditions. Isoindigo derivatives have many industrial applications, e.g., dyes, drugs, organic solar cells, and semiconductor memories. The antimicrobial activities of these compounds have also been tested.