Tetrahedron p. 1661 - 1666 (1982)
Update date:2022-08-05
Topics:
Auria, M. D'
Mico, A. De
Piancatelly, G.
Scettry, A.
A new and useful synthesis of a title compounds is reported.They can be obtained easily by photocyclization of enedicarbonyl compounds 3 and 4.A different behaviour, ascribed to the geometry of a double bond, is observed; 3 are converted only to butenolides 5, while trans-isomers 4 are converted into alkyl-furyl-ketones 5 and 6.A possible mechanism is described.
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