
Tetrahedron p. 1723 - 1734 (1996)
Update date:2022-07-31
Topics:
Tome, Augusto C.
Cavaleiro, Jose A. S.
Storr, Richard C.
Pyrimidone fused sulfones 5-7 were obtained from the reaction of amidines with 3-methoxycarbonyl-4-oxotetrahydrothiophene followed by N-methylation and oxidation with mCPBA. On heating in solution at 150°C, extrusion of SO2 occurred to give the highly reactive 5,6-dimethylenepyrimidin-4-ones which were intercepted in situ in Diels-Alder reactions to give the adducts 24-28 and in conjugate addition reactions with thiol nucleophiles to give the thioethers 29 and 30.
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(1996)