A novel pathway for the synthesis of a carboxylic acid-functionalised Ru(II) terpyridine complex

A new terpyridinyl ruthenium(II) complex functionalised with a carboxylic acid moiety was synthesised. This complex was prepared according to two different pathways. The first one successively involves protection of the carboxylic group on the ligand before formation of the complex followed by hydrolysis. The second one is a new route based on oxidation of a furan ring directly on the complex.