Enantio- and Diastereoselective Spiroketalization Catalyzed by Chiral Iridium Complex
作者:James Y. Hamilton、Simon L. Rössler、Erick M. Carreira
DOI:10.1021/jacs.7b02856
日期:2017.6.21
complex-catalyzed enantio- and diastereoselective formation of substituted spiroketals from racemic, allylic carbonates is reported, which enables the installation of multiple stereogenic centers in a single operation. The protocol was effective for the preparation of a collection of spiroketals of various ring sizes and substituents, including heteroatoms with high enantio- and diastereoselectivity. Furthermore
据报道,铱-(P,烯烃)配合物催化对映选择性和非对映选择性从外消旋烯丙基碳酸酯形成取代的螺旋缩酮,这使得在一次操作中安装多个立体中心成为可能。该方案可有效制备各种环大小和取代基的螺缩酮集合,包括具有高对映选择性和非对映选择性的杂原子。此外,已经实现了将这种对映选择性和非对映选择性转化与额外的可逆过程结合起来的级联反应,以对额外的立体中心施加伴随的立体控制。