10.1021/ol8013683.s001 Lei Li Lei Li Robert McDonald Robert McDonald F. G. West F. G. West Concise Route to Triquinanes from Pyran-2-ones American Chemical Society 2008 Triquinane pyran sequence triquinane ring systems intramolecular decarboxylation cyclooctatriene photocycloaddition Concise Route elimination pendent furans Pyran shift transannular aldolization MeLi 2008-09-04 00:00:00 Dataset https://acs.figshare.com/articles/dataset/Concise_Route_to_Triquinanes_from_Pyran_2_ones/2916556 Treatment of ether-bridged cyclooctatrienes (formed via intramolecular [4 + 4]-photocycloaddition of pyran-2-ones bearing pendent furans, followed by thermal decarboxylation) with excess MeLi furnishes triquinane ring systems via an apparent sequence of β-elimination, 1,5-hydrogen shift, and transannular aldolization.