Building blocks for (C15−C3)-modified epothilone D analogs
摘要:
A promising potentially biologically active structure have been designed by isosteric rearrangement of the C-15-C-3 fragment of epothilone D, and building blocks necessary for its assembly have been synthesized.
elucidation of an endogenous sperm-activating and -attracting factor isolatedfrom eggs of the ascidian Ascidia sydneiensis (Assydn-SAAF), its two possible diastereomers with respect to C-25 were synthesized. Starting from ergosterol, the characteristic steroid backbone was constructed by using an intramolecular pinacolcoupling reaction and stereoselective reduction of a hydroxy ketone as key steps