Intramolekulare [2+2]-cycloadditionen von γ-oxoketenen
作者:Joachim Hegmann、Manfred Christl、Karl Peters、Eva-Maria Peters、Hans Georg von Schnering
DOI:10.1016/s0040-4039(00)96879-5
日期:1987.1
The γ-oxoketenes, which are accessible from methyl 1,3,4-oxadiazin-6-one-2-carboxylate-1 and cycloalkenes, are shown to undergo an intramolecular [2+2] cycloaddition either on heating or on photolysis to give different stereoisomers of β-lactones of the 3-oxo-2-oxabicyclo[2.2.0]hexane-type.