A strategy toward tetrapetalones was explored including a site-selective ethylenation of the silyl enol ether A to afford a quaternary stereocenter that serves in a stereogenic capacity. Regio- and diastereoselective reactions were observed in conjunction with the oxidative formation of cation B, which included subsequent selective formation of either carbon–oxygen or carbon–carbon bonds at the δ or
已研究出一种针对四氢
萘酮的策略,包括甲
硅烷基烯醇醚A的位点选择性
乙烯化,以提供具有立体生成能力的四级立体中心。观察到区域和非对映选择性反应与阳离子B的氧化形成有关,其中包括随后在7元环的δ或ζ位选择性形成碳-氧或碳-碳键。使用Stetter反应形成第四环。