Beilstein Arch. 2022, 202283. https://doi.org/10.3762/bxiv.2022.83.v1
Published 11 Oct 2022
A straightforward access to novel spiro[benzofuran-2,3'-pyrrolidine]-2',5'-diones based on Rh2(esp)2-catalyzed insertion of carbenes derived from diazo arylidene succinimides (DAS) into O-H bond of phenols is described. The initial adducts underwent a thermally promoted Claisen rearrangement followed by DABCO-catalyzed intramolecular 5-exo-dig Michael addition.
Keywords: rhodium(II) carbene O-H insertion; diazo arylidene succinimides; Claisen rearrangement; intramolecular Michael addition; spirocycles
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Vepreva, A.; Yanovich, A.; Dar'in, D.; Kantin, G.; Bunev, A.; Krasavin, M. Beilstein Arch. 2022, 202283. doi:10.3762/bxiv.2022.83.v1
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