We report a highly diastereoselective synthesis of polysubstituted bicyclobutanes possessing up to three stereodefined quaternary centers and five substituents. Our strategy involves a diastereoselective carbometalation of cyclopropenes followed by a cyclization to furnish the bicyclobutane ring system. This straightforward approach allows for the incorporation of a diverse range of substituents and
我们报道了多取代双
环丁烷的高度非对映选择性合成,该多取代双
环丁烷具有多达三个立体定义的四级中心和五个取代基。我们的策略涉及环
丙烯的非对映选择性碳
金属化,然后环化以提供双
环丁烷环系统。这种简单的方法允许掺入各种取代基和官能团,特别是不需要吸电子功能。