@article{oai:soar-ir.repo.nii.ac.jp:00011891,
 author = {Morita,  N and Higashi,  J and Okada,  K and Shoji,  T and Toyota,  K and Watanabe,  M and Yasunami,  M and Kikuchi,  S and Ito,  S},
 issue = {1},
 journal = {Heterocycles},
 month = {},
 note = {5-Isopropyl-2H-cyclohepta[b]furan-2-one (1) reacted with DMSD to give dimethyl(5-isopropyl-2-oxo-2H-cyclohepta[b]furan-3-yl)sulfonium trifluoromethanesulfonate (2), which was treated with E(t)3N to give 5-isopropyl-3-methylthio-2H-cyclohepta[b]furan-2-one (3). Sulfide 3 was oxidized with mCPBA to give sulfoxide 4 and sulfone 5. The salt 6 which comes from the treatment of 4 with Tf2O converted to an unexpected product, 5,5'-diisopropyl-3,3'-bi-2H-cyclohepta[b]furan-2-one (7), thermally., Article, Heterocycles. Vol 73, Issue 1, 2007, pp.237-240.},
 pages = {237--240},
 title = {A Novel Approach to 5,5’-Diisopropyl-3,3’-bi-2H-cyclohepta[b]furan-2-one},
 volume = {73},
 year = {2007}
}