作者:Steven D. Hiscock、Peter B. Hitchcock、Philip J. Parsons
DOI:10.1016/s0040-4020(98)00676-0
日期:1998.9
A new approach to the synthesis of Prelog-Djerassi Lactonic acid (1) is reported. A key step in this synthesis involves an Ireland-Claisen rearrangement/silicon-mediated fragmentation sequence to provide the carbon framework in (1).
Stereocontrol in organic synthesis using silicon-containing compounds. A synthesis of the (±)-Prelog–Djerassi lactone
作者:Hak-Fun Chow、Ian Fleming
DOI:10.1039/a804270e
日期:——
β-silyl ester, the enolate alkylation 11→12 of a β-silyl ester, silyl-to-hydroxy conversion with retention of configuration 13→14, and stereospecifically anti protodesilylation of the allylsilanes 26 and 27 giving largely the alkene 28. These allylsilanes had themselves been prepared in a stereocontrolled, convergent synthesis from the allylic acetates 24 and 25, providing thereby a general solution to the
A 16-membered macrolide antibiotic, protomycinolideIV, was synthesized from two fragments to which the chirality was introduced by asymmetric epoxidation of the appropriately chosen allylic alcohols. A new synthesis of the Prelog-Djerassi lactonic acid from one of the intermediates of the synthesis was also carried out.