Journal of the Chemical Society. Chemical communications p. 1560 - 1562 (1989)
Update date:2022-08-05
Topics:
Camps, Francisco
Moreto, Josep M.
Ricart, Susagna
Vinas, Josep M.
Molins, E.
Miravitlles, C.
The reaction of ethyl diethoxyacrylate with alkynylalkoxycarbene metal complexes affords 6-ethoxy-2H-pyranylidene metal complexes (M=Cr, W) through a plausible <2+2> cycloaddition, followed by conrotatory cyclobutene opening and final cyclization at the carbene centre; mild dimethylsulphoxide (DMSO) oxidation of the resulring complex gives the free ligand quantitatively.
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