An Ir-catalyzed enantioselective hydrogenation of 2-alkyl-pyridines has been developed using ligand MeO-BoQPhos. High levels of enantioselectivities up to 93:7 er were obtained. The resulting enantioenriched piperidines can be readily converted into biologically interesting molecules such as the fused tricyclic structures 5, 6, and 7 in 99:1 er, providing a novel, concise synthetic route to this family
使用
配体 MeO-BoQPhos 开发了 Ir 催化的 2-烷基-
吡啶对映选择性氢化。获得了高达 93:7 er 的高
水平对映选择性。所得的对映体富集的
哌啶可以很容易地转化为
生物学上感兴趣的分子,例如99:1的稠合
三环结构5、6和7,为该类手性含
哌啶化合物提供了一种新颖、简洁的合成路线。