Rhodium(I)-catalyzed β-carbon eliminations of tert-cyclobutanols followed by oxidative addition give benzorhoda(III)cyclopentenes. These key intermediates trigger intramolecular CâH arylations leading to β-tetralones with quaternary stereogenic centers in excellent enantioselectivity. The versatility of the rhoda(III)cyclic species is further shown in formal intramolecular [4+2]-cycloadditions providing access to benzobicyclo[2.2.2]octanones.
铑(I) 催化叔
环丁醇的β-碳消除,然后氧化加成得到Benzorhoda(III)
环戊烯。这些关键中间体触发分子内 C–H 芳基化,生成具有优异对映选择性的四元立体中心的
β-四氢萘酮。 rhoda(III)环状物质的多功能性在提供苯并双环[2.2.2]辛酮的正式分子内[4+2]-环加成中进一步显示。