A“Chiral Aldehyde” Equivalent as a Building Block Towards Biologically Active Targets
作者:Barry M. Trost、Matthew L. Crawley
DOI:10.1002/chem.200305634
日期:2004.5.3
by the Bayer corporation. These studies further inspired work that culminated in the total synthesis of (+)-brefeldin A, a natural product with a range of significant biological properties. All of the stereochemistry in this target molecule was derived from two palladium-catalyzed asymmetric allylic alkylation reactions. The trans-alkenes were synthesized by a Julia olefination and a ruthenium-catalyzed
可通过外消旋酰氧基丁烯化物的动态动力学不对称转化(DYKAT)容易获得的手性γ-芳氧基丁烯化物被用作分子间环加成反应和迈克尔反应的“手性醛”结构单元。具有这种结构单元的三甲撑甲烷环加成反应中空前的选择性使拜耳公司正在开发的新型代谢型谷氨酸受体1拮抗剂得以有效合成。这些研究进一步启发了工作,最终完成了(+)-布雷菲德菌素A的全合成,这是一种具有一系列重要生物学特性的天然产物。该靶分子中的所有立体化学均源自两个钯催化的不对称烯丙基烷基化反应。通过朱莉亚烯化和钌催化的反式氢化硅烷化-原去甲硅烷基化方法合成反式烯烃。(+)-布雷菲德菌素A的路线很适合进行模拟合成,并以18个步骤完成,总收率为6%。