%0 Journal Article %T Side-chain opening of steroidal sapogenins to form 22-oxocholestanic skeletons: An approach to analogues of the aglycone of the potent anticancer agent OSW-1 %A Fern¨¢ndez-Herrera %A Mar¨ªa A. %A Sandoval-Ram¨ªrez %A Jes¨²s %A Meza-Reyes %A Socorro %A Montiel-Smith %A Sara %J Journal of the Mexican Chemical Society %D 2009 %I Sociedad Qu¨ªmica de M¨¦xico %X the side-chain opening of 25r and 25s steroidal sapogenins to form 22-oxocholestanic skeletons is described. the transformation was produced under mild conditions providing high yields (70-87%), in a one pot procedure (some acetylated starting material is recovered). this methodology yields 17-deoxy-26-oxy analogues of the aglycone of the potent anticancer agent osw-1. all products were fully characterized by 1d and 2d nmr; the most representative displacements are briefly discussed. %K steroidal sapogenins %K acetolysis %K aglycone %K osw-1. %U http://www.scielo.org.mx/scielo.php?script=sci_abstract&pid=S1870-249X2009000300007&lng=en&nrm=iso&tlng=en