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Alkynyl sulfoxides react with Cp2Zr(H)Cl in THF at room temperature to give
the alpha -zirconated and beta -zirconated vinyl sulfoxides, which react w
ith a wide range of electrophiles to give several types of di- or trisubsti
tuted olefins, such as Z-vinyl sulfoxides and alpha- or beta -halo vinyl su
lfoxides. (C) 2000 Elsevier Science Ltd. All rights reserved.