作者:Qi Zhang、Hong-Xia Jin、Yikang Wu
DOI:10.1016/j.tet.2006.09.061
日期:2006.12
Bicyclo[3.2.1] type 1,2,4-trioxanes are readily synthesized from precursors that may form intramolecular hemiketals using UHP (H2O2-urea complex) as the source of the peroxy bond and p-TsOH or CSA as the catalyst. The ring closure through an intramolecular Michael addition occurred in a highly stereoselective way, giving only one diasteromer as shown by the NMR spectra. (c) 2006 Elsevier Ltd. All rights reserved.