Helvetica Chimica Acta

Synthesen und Thermolysen von 1??Alkinyl??2??methyl??1, 2??epoxy??cycloalkanen.??Versuche zur Ringerweiterung um drei Kohlenstoffatome

M Karpf, AS Dreiding

Index: Karpf,M.; Dreiding,A.S. Helvetica Chimica Acta, 1977 , vol. 60, p. 3045 - 3059

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Citation Number: 12

Abstract

Summary The 1-alkynyl-2-methyl-1, 2-epoxy-alkene 2 and-cycloalkenes 9, 28 and 29 were obtained by epoxidation of the conjugated en-ynes 1, 7, 26 and 27. The 12-membered ring en-ynes 26 and 27 were synthesized by ethynylation or propynylation of 2- methylcyclododecanone (19) to the 1-ethynyl-or 1-(1'-propyny1)-cyclododecanols 20A/B and 21A/B, respectively, followed by dehydration to give separable mixtures of the regio- ...