Synthesis of biologically active steroid derivatives by the utility of Lawesson's reagent
摘要:
Steroid derivatives V, VI, VII and VIII reacted with Lawesson's reagent (LR) to produce spiro-oxazaphosphole-4', 17-androstene derivative XI, diazaphospholoandrostane XIV and the thionated derivatives XVI and XVII, respectively. The structures of the new compounds were confirmed by analytical and spectroscopic evidence. A mechanism accounting for the formation of the new compounds was given. The in vitro antimicrobial activity of the new compounds were tested. (c) 2005 Elsevier Inc. All rights reserved.