Palladium-catalysed annulation reaction of allenyltins with β-iodo vinylic acids: selective synthesis of α-pyrones

…, M Abarbri, J Thibonnet, A Duchêne…

Index: Rousset; Abarbri; Thibonnet; Duchene; Parrain Chemical Communications, 2000 , # 20 p. 1987 - 1988

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Citation Number: 5

Abstract

We report here the selective one pot synthesis of α-pyrones under palladium complex catalysis. Our investigation began with the coupling of tributylstannylallene 8 with (Z)-3-iodoprop -2-enoic acid 5 under conditions previously defined by our group. 6 Unfortunately, neither allenyl substituted propenoic acid nor cyclised products (5- or 6-membered ring lactones) were detected. Only a large amount of tin by-products were recovered, among them the ...