Ruthenium-Catalyzed Hydroarylation of Methylenecyclopropanes through CH Bond Cleavage: Scope and Mechanism
作者:Lutz Ackermann、Sergei I. Kozhushkov、Dmitry S. Yufit
DOI:10.1002/chem.201200406
日期:2012.9.17
2‐diphenylmethylenecyclopropane (2), methylenespiropentane (3), bicyclopropylidene (4), (dicyclopropylmethylene)cyclopropane (5), and benzhydrylidenecyclopropane (6) through CH bond functionalization of 2‐phenylpyridine (7 a) and other arenes with directing groups were studied. The reaction was very sensitive to the substitution on the methylenecyclopropanes. Although these transformations involved (cyclopropylcarbinyl)–metal
高度紧张甲基环的分子间反应hydroarylation 2- phenylmethylenecyclopropane(1),2,2- diphenylmethylenecyclopropane(2),methylenespiropentane(3),bicyclopropylidene(4),(dicyclopropylmethylene)环丙烷(5),和benzhydrylidenecyclopropane(6)至C ħ研究了2-苯基吡啶(7 a)和其他带有导向基团的芳烃的键功能化。该反应对亚甲基环丙烷上的取代非常敏感。尽管这些转变涉及(环丙基羰基)-金属中间体,但底物1和4提供的反马尔可夫尼科夫氢化芳基化产品可以完全保护所有环丙烷环,产率为11%至93%,而原料3和5对氢化芳构化是惰性的。亚甲基环丙烷6形成最长的远侧C的正式hydroarylation反应的产物 C键中以高收率的