Catalytic, Asymmetric Synthesis of Phosphonic γ-(Hydroxyalkyl)butenolides with Contiguous Quaternary and Tertiary Stereogenic Centers
作者:Marcus Frings、Isabelle Thomé、Ingo Schiffers、Fangfang Pan、Carsten Bolm
DOI:10.1002/chem.201304331
日期:2014.2.3
yielding access to phosphonic γ‐(hydroxyalkyl)butenolides with excellent regio‐, diastereo‐ and enantiocontrol is reported. The simultaneous construction of up to two adjacent quaternary stereogenic centers by a catalytic asymmetric vinylogous Mukaiyama aldol reaction unites biologically and medicinally relevant entities, namely α‐hydroxy phosphonates and γ‐(hydroxyalkyl)butenolides. This is achieved by
据报道,该方法可高收率地获得具有出色的区域,非对映和对映体控制能力的膦酸γ-(羟烷基)丁烯内酯。催化不对称乙烯基Mukaiyama aldol反应最多可同时构建两个相邻的四级立体异构中心,这些结构在生物学和医学上相关的实体,即α-羟基膦酸酯和γ-(羟烷基)丁烯醇内酯。这是通过利用易于获得的手性铜-亚磺酰亚胺催化剂对亲电子和亲核反应物表现出宽泛的官能团耐受性来实现的。还包括对影响观察到的对映选择性水平的潜在因素的讨论,对映选择性水平来自对映纯的亚砜亚胺配体。