α-Substituted β-methylallyl sulphoxides (2) and sulphones (3) undergo regio- and stereo-selective desulphurizative γ-substitution by the action of lithium dialkylcuprates in ether. The reaction provides a new method for the synthesis of trisubstituted E-olefins E-(4).
Y. Masaki, K. Sakuma and K. Kaji, J. Chem. Soc., Perkin Trans. 1, 1985, 1171 DOI: 10.1039/P19850001171
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