UEBERBRUECKTE NEUNGLIEDRIGE α,β-UNGESAETTIGTE ENOLLACTONE - SYNTHESE AUS 5-PHENYL-1,3,4-OXADIAZIN-6-ON-2-CARBONSAEURE-METHYLESTER UND KONFIGURATIONSANALYSE

Article abstract of DOI:10.1016/S0040-4039(00)96880-1

The γ-oxoketenes, which are formed from oxadiazinone 3a and strained cyclopentene derivatives, are shown to undergo a pericyclic ring enlargement to give the title compounds 2a, 2b, and 5.In the case of 5 two configurations, one having a cis and the other