Tetrahedron Letters p. 4859 - 4862 (1990)
Update date:2022-08-11
Topics:
Fotiadu
Archavlis
Buono
α-Vinylidene-γ-butyrolactones 2 and 4 are readily prepared via the reaction of ylides 1 or 3 with ketene. Diels-Alder cycloadditions of these compounds with typical dienes are described, addition of 2 to cyclopentadiene giving predominantly the exo stereomer.
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(1975)
