Synthesis and biological activity of 4-aryl-3-benzoyl-5-phenylspiro[pyrrolidine-2.3′-indolin]-2′-one derivatives as novel potent inhibitors of advanced glycation end product

• Synthesis of novel 4-aryl-3-benzoyl-5-phenylspiro[pyrrolidine-2.3′-indolin]-2′-ones.
• Characterization of synthesized derivatives using spectral studies.
• In vitro assay of synthesized compounds against formation of advanced glycation end products.
• Structure–activity relationship has been discussed.

Diabetic complications and their detrimental effects caused by sugar derived substances, have been the serious issue for the last few years and have yet not been fully combated. The key point of the present study is to synthesize some newer chemical entities which can eradicate such ailments to the maximum possible extent. So with this aim synthesis of some biologically interesting spiro-indolone-pyrrolidine derivatives was accomplished by 1,3-dipolar cycloaddition reaction of azomethine ylide 6 generated in situ from isatin and benzyl amine with the substituted α,β-unsaturated carbonyl compounds 3 as dipolarophile, leading to the formation of new 4-aryl-3-benzoyl-5-phenylspiro[pyrrolidine-2.3′-indolin]-2′-one derivatives 7 stereoselectively in excellent yields. The synthesized compounds have been screened for their advanced glycation end (AGE) product formation inhibitory activity on the basis of their ability to inhibit the formation of AGEs in the bovine serum albumin (BSA)-glucose assay and have been found to exhibit significant activity against AGE formation.

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