Tetrahedron Letters p. 4231 - 4232 (1984)
Update date:2022-08-05
Topics:
Ishibashi, H.
Kitano, Y.
Nakatani, H.
Okada, M.
Ikeda, M.
et al.
In the presence of SnCl4, methoxycarbonyl-, acetyl-, benzoyl-, or cyano-substituted chloromethyl methyl sulfide (1-4) undergoes <2++4> polar cycloaddition with conjugated dienes to afford the cycloadducts of type 7, which, on treatment with base, are converted into the 1-acyl- or 1-cyano-1-methylthio-2-vinylcyclopropanes 9-10 via the ylide intermediates of type 8.
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