Tetrahedron Letters p. 5919 - 5922 (1988)
Update date:2022-08-18
Topics:
Cheikh, A. Ben
Dhimane, H.
Pommelet, J.C.
Chuche, J.
Heterosubstituted methyleneketenes 2d-g are obtained by flash-vacuum pyrolysis of Meldrum's acid derivatives 1d-g.The methoxymethyleneketene 2e is stable for a few hours at room temperature and gives 3e by dimerization; in contrast, the more reactive thiomethoxymethyleneketenes 2f-g are easily converted to 4f-g by intramolecular rearrangement.
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