Synthesis, spectral characterization, and single crystal structure studies of biologically relevant bis-indoline heterocyclic scaffold

Abstract

The new biologically relevant compound, 5,5″-methoxy-1′-methyl-1H,1″H-[3,3′:3′,3″-terindol]-2′(1′H)-one was synthesized, in 89% yield, by the one-pot reaction between 5-methoxyindole and 1-methylisatin in the presence of a low-cost and environmentally benign commercially available sulfamic acid as an organocatalyst and have been characterized by elemental analyses, IR spectra, and single crystal X-ray analysis. The crystals are orthorhombic, sp. gr. Pbca, Z = 8. The structure is stabilized by N–H···O and C–H···O interactions.