Synthetic Communications

An Improved Synthesis of Dialkylcyclopropenones

KA Netland, LL Gundersen, F Rise

Index: Netland, Kjetil Andreas; Gundersen, Lise-Lotte; Rise, Frode Synthetic Communications, 2000 , vol. 30, # 10 p. 1767 - 1777

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Citation Number: 15

Abstract

Abstract: Dialkylcyclopropenones are formed in high yields when alkynes are treated with chloroform-butyllithium in THF at - 78 OC followed by acidic hydrolysis of the dichlorocyclopropene intermediates at low temperatures. ... Cyclopropenones undergo several interesting reactions and they may be ... Modified Favorskii reactions on a,a'-dibromoketones gives ... Another route to cyclopropenones is addition of dichlorocarbeniod reagents to