Cobalt??Mediated Linear 2: 1 Co??oligomerization of Alkynes with Enol Ethers to Give 1??Alkoxy??1, 3, 5??Trienes: A Missing Mode of Reactivity

…, M Malacria, KPC Vollhardt, C Aubert…

Index: Lebuf, David; Iannazzo, Laura; Geny, Anais; Malacria, Max; Peter C Vollhardt; Aubert, Corinne; Gandon, Vincent Chemistry - A European Journal, 2010 , vol. 16, # 29 p. 8904 - 8913

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Citation Number: 20

Abstract

Abstract A variety of 1, 6-heptadiynes and certain borylalkynes co-oligomerize with enol ethers in the presence of [CpCo (C 2 H 4) 2](Cp= cyclopentadienyl) to furnish the hitherto elusive acyclic 2: 1 products, 1, 3, 5-trien-1-ol ethers, in preference to or in competition with the alternative pathway that leads to the standard [2+ 2+ 2] cycloadducts, 5-alkoxy-1, 3- cyclohexadienes. Minor variations, such as lengthening the diyne tether, cause reversion ...