Abstract
Abstract A recent report about the synthesis of di and tri-substituted 2 (5H)-furanones starting from bromoaldehydes and potassium phenyl-acetate1 prompts us to report our own studies on the preparation of 3-aryl-5-arylmethylene-2 (5H)-furanones (or butenolides) 1. We have earlier reported2 a general method for the synthesis of 1 from phenylpropargyl aldehyde, 2 and arylacetic acids. Although several methods have been reported for the synthesis of the parent compound 1 (R = R1 = Ph)3–6, these methods have not been extended to other substituted furanones. Saikachi and Taniguchi7 prepared 1 (R = 5-nitro-2-thenyl, R1 = 2-thenyl and 2-furyl) in 16–17% yields.
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