Synfacts 2005(1): 0149-0149  
DOI: 10.1055/s-2005-872128
Metal-Mediated Synthesis
© Georg Thieme Verlag Stuttgart · New York

Cyclopropanation and Carbonyl Olefination of Alkynylsilyldithianes via Titanium Alkynyl­-carbenes

Contributor(s): Paul Knochel, Andrei Gavryushin
T. Takeda*, M. Ozaki, S. Kuroi, A. Tsubochi
Tokyo University of Agriculture and Technology, Japan
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21. September 2005 (online)


Starting from readily available alkynylsilyldithianes, polysubstituted alkynylcyclopropanes and enynes can be obtained in a one-step reaction, usually in good yields. The reaction also illustrates an interesting example of a silicon-directed allylic rearrangement.