2006

Furan derivativesR 0060 A Highly Efficient Procedure for Ruthenium Tetroxide Catalyzed Oxidative Cy-

clizations of 1,5-Dienes. — A highly efficient method for the oxidative cyclization of 1,5-dienes is presented. It involves NaIO4 on wet silica as solid-supported terminal ox-idant and RuCl3 as a precatalyst for ruthenium tetroxide. The corresponding di(α-hy-droxyalkyl)-substituted tetrahydrofurans, e.g. (II) and (IV), are formed in high dia-stereo- and chemoselectivity. — (ROTH, S.; GOEHLER, S.; CHENG, H.; STARK*, C. B. W.; Eur. J. Org. Chem. 2005, 19, 4109-4118; Inst. Org. Chem., FU Berlin, D-14195 Berlin, Germany; Eng.) — Mischke

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