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An efficient synthesis of hydroindeno[1,2-b]indoles is described via three-component reaction of ninhydrin and cycloalkan-1,3-dione in the presence of primary amines in water as the green solvent in excellent yield.
An efficient synthesis of hydroindeno [1,2-b] indoles is described via three-component reaction of ninhydrin and cycloalkan-1,3-dione in the presence of primary amines in water as the green solvent in excellent yield.