Studies on Organophosphorus Compounds XIII <sup>,</sup> : Efficient Synthesis of Polyfunctionally Substituted Heterocycles by the Utility of Phosphonium Salts
作者:Nadia R. Mohamed、Mervat M. Abdel Halim、Wafaa A. Gad、Mohamed F. Zaid
DOI:10.1080/10426500601013281
日期:2007.4.1
article the interaction of phosphonium salts 3a–c with thioanilide potassium salt 2 to produce the corresponding pyridinone derivatives 6,8 and thiophene derivative 10 , respectively. The interaction of thioanilide salt 12 with phosphonium salts 3a,c–e led to the formation of the corresponding thiophene derivatives 14a–d . On the other hand, the reaction of androstan derivative 15 with phenyl isothiocyanate
Synthesis of biologically active steroid derivatives by the utility of Lawesson's reagent
作者:N MOHAMED、G ELMEGEED、H ABDELMALEK、M YOUNIS
DOI:10.1016/j.steroids.2004.11.001
日期:2005.3
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.