10.1021/ol1004092.s003 Pipas Saha Pipas Saha U. C. Reddy U. C. Reddy S. Bondalapati S. Bondalapati Anil K. Saikia Anil K. Saikia A Novel Synthesis of Oxabicyclo[3.3.1]nonanone via (3,5)-Oxonium−Ene Reaction American Chemical Society 2010 reaction proceeds Oxabicyclo Novel Synthesis boron trifluoride etherate 2010-04-16 00:00:00 Dataset https://acs.figshare.com/articles/dataset/A_Novel_Synthesis_of_Oxabicyclo_3_3_1_nonanone_via_3_5_Oxonium_Ene_Reaction/2776384 Oxabicyclo[3.3.1]nonanone can conveniently be prepared by the reaction of <i>trans</i>-<i>p</i>-menth-6-ene-2,8-diol and aldehyde or epoxide mediated by boron trifluoride etherate in good yields. The reaction proceeds via (3,5)-oxonium−ene-type reaction.