An unusual peroxide base-promoted isomerization is uncovered. Saturated endoperoxides derived from fulvenes give rise to 2-vinyl-2-cyclopentenones upon treatment with DBU in CH2Cl2 in a one-pot reaction. This methodology is applied to a convenient synthesis of dihydrojasmone. Moreover, functional groups placed on the side chain at C-6 participate in the base-catalyzed isomerizations via conjugate attack at the enone moiety to give 2-cyclopentenones carrying oxygen heterocycles at C-2. © 2006 Elsevier Ltd. All rights reserved.
Erden, I., Öcal, N., Song, J., Gleason, C., & Gärtner, C. (2006). Unusual endoperoxide isomerizations: a convenient entry into 2-vinyl-2-cyclopentenones from saturated fulvene endoperoxides. Tetrahedron, 62(46), 10676–10682. https://doi.org/10.1016/j.tet.2006.07.107