Complete Stereocontrol in Organocatalytic Additions of β-Ketosulfoxides to Conjugated Aldehydes
作者:José Luis García Ruano、Cuauhtémoc Alvarado、Sergio Díaz-Tendero、José Alemán
DOI:10.1002/chem.201003267
日期:2011.3.28
The use of β‐ketosulfoxides as nucleophiles in reactions with α,β‐unsaturated aldehydes catalyzed by proline derivatives allows complete control of configuration at the two chiral centers that are created during 1,4‐addition reactions. The sulfinyl group can be used to create additional chiral centers in the resulting compounds and then removed while preserving the chirality of the carbon joined to
在脯氨酸衍生物催化的α,β-不饱和醛反应中使用β-酮亚砜作为亲核试剂可以完全控制在1,4加成反应中形成的两个手性中心的构型。亚磺酰基可用于在所得化合物中产生另外的手性中心,然后在保留与硫连接的碳的手性的同时被除去。催化剂和亚磺酰基主要负责分别控制用作亲电子和亲核的碳原子的构型控制,这允许制备光学纯形式的四种可能的非对映异构体。对带有非对映体面的可能手性亲核物质的理论计算使我们首次假设是烯醇化而不是烯醇化,