Palladium-Catalyzed Fluoride-Free Cross-Coupling of Intramolecularly Activated Alkenylsilanes and Alkenylgermanes: Synthesis of Tamoxifen as a Synthetic Application
作者:Kenji Matsumoto、Mitsuru Shindo
DOI:10.1002/adsc.201100627
日期:2012.3
intramolecular hypercoordination of a carboxylic acid is a powerful activation strategy for the palladium‐catalyzed cross‐coupling reaction of trialkyl(vinyl)silanes and trialkyl(vinyl)germanes under fluoride‐free conditions. Z‐β‐Trialkylsilyl‐ and Z‐β‐trialkylgermylacrylic acids, synthesized stereoselectively by olefination with ynolates, are highly stable and useful reagents for cross‐coupling with a variety
我们已经证明,在无氟条件下,羧酸的分子内高配位是钯催化的三烷基(乙烯基)硅烷与三烷基(乙烯基)锗烷的交叉偶联反应的强大活化策略。Z -β-三烷基甲硅烷基和Z -β-三烷基锗烷基丙烯酸是通过烯醇酸酯与烯烃的立体选择性合成而来的,是高度稳定且有用的试剂,可与多种芳基碘化物交叉偶联,从而提供具有立体控制和多样性的,具有不同碳取代基的四取代烯烃导向的方式。还报道了立体选择性合成(Z)-他莫昔芬的应用。