A new furan annelation reaction by the palladium-catalyzed reaction of 2-alkynyl carbonates or 2-(1-alkynyl) oxiranes with β-keto esters

I Minami, M Yuhara, H Watanabe, J Tsuji

Index: Minami, Ichiro; Yuhara, Masami; Watanabe, Hiroyuki; Tsuji, Jiro Journal of Organometallic Chemistry, 1987 , vol. 334, p. 225 - 242

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Citation Number: 104

Abstract

Abstract A new furan annelation by the palladium-catalyzed reaction of 2-alkynyl carbonates with β-keto esters is described. The reaction proceeds under mild neutral conditions and hence unstable 3-alkylidene-2, 3-dihydrofurans can be prepared in this way. Similarly, reaction of 2-(1-alkynyl) oxiranes with β-keto esters gives alkylidene furans.