Indium(iii)-catalyzed efficient synthesis of 3-arylhydrazonoindolin-2-ones and their fluorescent metal sensing studies

Abstract

An efficient and facile In(III)-catalyzed reaction of 3-diazoindolin-2-ones with different arylhydrazines is demonstrated. This approach offers a rapid synthetic route to diversely functionalized 3-arylhydrazonoindolin-2-ones in good yields. This novel protocol introduces biologically and photo-functionally interesting hydrazones at the 3-position of indolin-2-ones. The synthesized compounds are further used to investigate their fluorescence responses toward heavy metal ions.