Synthesis of some medium-and large-ring cycloalk-2-ene-1, 4-diones by intramolecular coupling of αω-bis-diazoketones

S Kulkowit, MA McKervey

Index: Kulkowit,S.; McKervey,M.A. Journal of the Chemical Society, Chemical Communications, 1978 , p. 1069 - 1070

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Citation Number: 20

Abstract

In the presence of Cu (acac) 2 (Hacac= acetylacetone) some αω-bis-diazoketones couple intramolecularly with loss of nitrogen giving cycloalk-2-ene-1, 4-diones; the enediones can be converted into fused ring cyclopentenones by successive treatment with sodium dithionite and sodium hydroxide.