Vinyl sulphones (1) were subjected to nucleophilic addition by α-lithionitriles (2) and gave cyclized products, 3-oxothian 1,1-dioxides (3) or cyclopropane derivatives (4), in satisfactory yields according to the substituents on the reagents. The cyclopropanation reactions could be extended to the formation of cyclopropyl sulphides (12)–(16) in good yields.
T. Agawa, Y. Yoshida, M. Komatsu and Y. Ohshiro, J. Chem. Soc., Perkin Trans. 1, 1981, 751 DOI: 10.1039/P19810000751
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