Ring closure reactions O 0130 1-Phenylthio-3-vinyl-3-cyclohexenol, a New Reagent for Bis-Annelation of SilylEnol Ethers. -Lewis acid-catalyzed reaction of title reagent (III) with silyl enol ethers (IV), (VIII) or (XII) proceeds smoothly to afford, after hydrolysis, the corresponding enones (VI), (IX) and (XIII)/(XIV) which can be cyclized in a homologous aldol reaction to afford phenanthrene derivatives, e.g. (V). -(KONSTANTINOVA, O.; SARABER, F. C. E.; MELGUIZO, E.; JANSEN, B. J. M.; DE GROOT*, A.; Tetrahedron 62 (2006) 8, 1749-1755; Lab. Org. Chem., Wageningen Univ., NL-6703 HB Wageningen, Neth.; Eng.) -Mischke 24-043