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Synfacts 2011(1): 0110-0110  
DOI: 10.1055/s-0030-1259141
Polymer-Supported Synthesis
© Georg Thieme Verlag Stuttgart ˙ New York

Dihydroxylation of Olefins with Dendric Osmium Complex

Contributor(s): Yasuhiro Uozumi, Noboru Kobayashi
K.-i. Fujita*, M. Yamazaki, T. Ainoya, T. Tsuchimoto, H. Yasuda
National Institute of Advanced Industrial Science and Technology, Tsukuba and Meiji University, Kawasaki, Japan
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Publication History

Publication Date:
21 December 2010 (online)

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Significance

Dendric osmium complexes 3(Gn) were prepared from N,N,N′,N′-tetramethylethy­lenediamine 1 in two steps. The complex 3(G3) catalyzed the dihydroxylation of olefins 4 in the presence of NMO to afford the corresponding ­diols 5 in up to 94% yield (10 examples). In the ­reaction of 4a, the catalyst was recovered by ­reprecipitation and reused four times (4th reuse: 91% yield).