phosphinyl oxide groups were easily synthesized in a straightforward procedure by reaction of readily available proline-based scaffolds and phosphinoyl chlorides. The newly synthesized derivatives were employed (0.1 mol equiv) as organocatalysts in the Lewis acid-mediated Lewis base-promoted direct stereoselective aldol reactions of activated thioesters with aromatic aldehydes, carried out in the presence
                                    通过容易获得的基于脯
氨酸的支架和膦酰
氯的反应,可以以简单的方法容易地合成一组含有不同二苯基次膦氧化基的对映体纯的路易斯碱。在四
氯硅烷和叔胺的存在下,在
路易斯酸介导的路易斯碱促进的活化
硫酯与芳族醛的立体选择性醛醇缩合反应中,新合成的衍
生物被用作有机催化剂(0.1摩尔当量)。在中度到高收率获得β羟基
硫酯,具有非常高的顺式非对映选择性(DR高达> 98:2),和对映选择性公平(EE高达51%)。为了阐明立体选择的起源,进行了理论研究。