Tetrahedron Letters p. 2319 - 2322 (1985)
Update date:2022-08-03
Topics:
Reglier, Marius
Julia, Sylvestre A.
The conditions for the preparation and cyclisation of the title compounds 3 are described.The stability of the intermediate lithio-thiacyclohexenes 4 is shown to depend on the reaction conditions and the substituents R1-R4.The final Products 6, 10 and 7 arise from 4 via <1,4> sigmatropic rearrangement, a <1,3> prototropic shift followed by a <2,3> sigmatropic rearrangement, or the elimination of lithium methanethiolate respectively.
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