Fast [3+2] Cycloaddition Synthesis of (±) Pterocarpans under Microwave Irradiation

Claiton      P. Ventura; Iara      Maira de O. Viana; Eruzia      A.E. Ferreira; Rossimiriam      P. de Freitas; Rosemeire      B. Alves

doi:10.2174/157017810791514896

Abstract

Herein we describe a method for the fast cycloaddition reaction of 2H-chromenes with 2-methoxy-1,4- benzoquinones by microwave heating. Using this methodology we have synthesised seven pterocarpans derivatives, five of which are novel compounds. Microwave heating allows significant yield enhancements and reduction of reaction time when compared to traditional methodology.

Keywords: (±) Pterocarpans, 2H-chromenes, cycloaddition, microwave irradiation, 2-methoxy-1,4-benzoquinones

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Letters in Organic Chemistry

Title: Fast [3+2] Cycloaddition Synthesis of (±) Pterocarpans under Microwave Irradiation

Volume: 7 Issue: 5

Author(s): Claiton P. Ventura, Iara Maira de O. Viana, Eruzia A.E. Ferreira, Rossimiriam P. de Freitas and Rosemeire B. Alves

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Keywords: (±) Pterocarpans, 2H-chromenes, cycloaddition, microwave irradiation, 2-methoxy-1,4-benzoquinones

Abstract: Herein we describe a method for the fast cycloaddition reaction of 2H-chromenes with 2-methoxy-1,4- benzoquinones by microwave heating. Using this methodology we have synthesised seven pterocarpans derivatives, five of which are novel compounds. Microwave heating allows significant yield enhancements and reduction of reaction time when compared to traditional methodology.

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P. Ventura Claiton, Maira de O. Viana Iara, A.E. Ferreira Eruzia, P. de Freitas Rossimiriam and B. Alves Rosemeire, Fast [3+2] Cycloaddition Synthesis of (±) Pterocarpans under Microwave Irradiation, Letters in Organic Chemistry 2010; 7 (5) . https://dx.doi.org/10.2174/157017810791514896