Concise Synthesis of a New Chiral Cyclopentenone Building Block for Prostaglandins and their Derivatives
作者:Remigiusz Żurawiński、Beata Łukasik
DOI:10.1002/ejoc.201900102
日期:2019.4.24
A facile four‐step protocol for the preparation of a new chiral phosphonate buildingblock is reported. Its exemplary functionalization at the C2 and C3 carbon atoms via the Wittig‐Horner reaction and by the Michael addition of organometallic reagents, respectively, is demonstrated as well.
Complex Aldol Reactions for the Construction of Dense Polyol Stereoarrays: Synthesis of the C<sub>33</sub>−C<sub>36</sub> Region of Aflastatin A
作者:David A. Evans、Frank Glorius、Jason D. Burch
DOI:10.1021/ol051226f
日期:2005.7.1
Facial selectivity in the addition of boron enolates of alpha-oxygenated ketones to anti-disposed alpha,beta-bisalkoxy aldehydes is controlled by the aldehyde vicinal diol protecting group. Protection of the diol as an acetonide results in the exclusive formation of the anti-syn-anti stereoarray found in the C-33-C-36 region of aflastatin A.