Novel goniofufurone and 7-epi-goniofufurone mimics from an unexpected titanium-mediated displacement process
作者:Jovana Francuz、Bojana Srećo、Mirjana Popsavin、Goran Benedeković、Vladimir Divjaković、Vesna Kojić、Gordana Bogdanović、Agneš Kapor、Velimir Popsavin
DOI:10.1016/j.tetlet.2012.01.121
日期:2012.4
Treatment of 7-O-benzoyl-5-O-benzyl derivatives of (+)-goniofufurone or 7-epi-(+)-goniofufurone with titanium(IV) chloride or titanium(IV) bromide gave 7-chloro and 7-bromo-7-deoxy-goniofufurone mimics as the main reaction products along with minor amounts of the corresponding C-7 epimers. An unexpected cyclized product, benzoxepane 8 was isolated in some cases. (C) 2012 Elsevier Ltd. All rights reserved.