Journal
TETRAHEDRON
Volume 64, Issue 17, Pages 3736-3743Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2008.02.023
Keywords
terpenoids; Lawesson's reagent; ketones; sulfur
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The reactions of selected triterpenic oxo compounds with Lawesson's reagent were investigated. We examined sulfurization of some oxygen one aldehyde, alpha-hydroxyketones, esters, or anhydrides were chosen. We synthesized 15 new sulfur derivatives, including thioketone 16, dimeric sulfides 17-19, and thiaderivatives 20-22. We also observed unusual transformations, which afforded oxathiaphosphinines 23a, 23b, and dithiaphospholanes 24. The prepared compounds failed to demonstrate any significant cytotoxic activity. (c) 2008 Elsevier Ltd. All rights reserved.
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