Pd-Catalyzed Tandem [5 + 2] Cycloaddition/Ring Contraction of Phthalide-Derived Alkenes and Vinylethylene Carbonates for the Construction of Benzo-[5,5]-spiroketal Lactones.
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DOI: 10.1021/acs.orglett.2c01114
Abstract: An annulation of phthalide-derived activated alkenes is initially disclosed in this work. Specifically, we have developed an unprecedented [5 + 2] cycloaddition/ring-contraction tandem process of activated tetrasubstituted alkenes derived from phthalides or butyrolactone with vinylethylene… read more here.
Keywords: spiroketal lactones; vinylethylene carbonates; phthalide derived; benzo spiroketal ... See more keywords