Sulfamic acid as energy efficient catalyst for synthesis of flurophores, 1-H-spiro [isoindoline-1,2′-quinazoline]-3,4′(3′H)-diones

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Abstract

An energy efficient synthesis of 1-H-spiro[isoindoline-1,2′-quinazoline]-3,4′(3′ H)-diones has been expediently accomplished by a reaction of isatin(s) / cyclic ketone and anthranilamide in ethanol at ambient temprature. Excellent yields of the products in short time duration, operational simplicity, and simple work-up procedure are the attractive features of the present protocol. Synthesized 1-H-spiro[isoindoline-1,2′-quinazoline]-3,4′(3′ H)-diones were found to be fluorescent with absorption in UV region (302, 362 nm) and emission in visible region (413-436 nm) with Stokes shift of 44-72 nm.

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Mane, M. M., & Pore, D. M. (2016). Sulfamic acid as energy efficient catalyst for synthesis of flurophores, 1-H-spiro [isoindoline-1,2′-quinazoline]-3,4′(3′H)-diones. Journal of Chemical Sciences, 128(4), 657–662. https://doi.org/10.1007/s12039-016-1047-7

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