A new approach to the side chain formation of 24-alkyl-22-hydroxy steroids: Application to the preparation of early brassinolide biosynthetic precursors
作者:Alaksiej L. Hurski、Vladimir N. Zhabinskii、Vladimir A. Khripach
DOI:10.1016/j.steroids.2012.03.010
日期:2012.6
introduction of the 22-hydroxyl group has been achieved by epoxidation of the Delta(22)-double bond, nucleophilic opening of the intermediate mesyl epoxide with sodium sulfide, and desulfurization of the formed tetrahydrothiophenes with Raneynickel.