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The side-chain opening of 25R and 25S steroidal sapoge- nins to form 22-oxocholestanic skeletons is described. The transfor- mation 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.

journal of the mexican chemical society

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