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■ Microwave-Assisted Synthesis of Substituted Naphtho[2,3-c]furan-1,3-dione Derivatives

Tomikazu Kawano,* Yu Ishikawa, and Minoru Hatanaka

*Department of Medicinal and Organic Chemistry, School of Pharmacy, Iwate Medical University, 2-1-1 Nishitokuta, Yahaba, Iwate 028-3694, Japan

Abstract

The self-condensation reaction of substituted phenylpropiolic acid derivatives (5a-d) by microwave irradiation at 100 °C for only three minutes proceeded smoothly to give substituted naphtho[2,3-c]furan-1,3-dione derivatives (1a-d) as single products in moderate to good yields, respectively.