Beilstein J. Org. Chem.2020,16, 2297–2303, doi:10.3762/bjoc.16.190
less congested one has been observed. The ketenes were exceptionally stable both in air and solution. Its stability studies in acetonitrile through time-dependent UV absorption spectra revealed that it remained almost unchanged at least for a couple of weeks.
Keywords: α,β- andβ,γ-enones; bridgehead