there has been only very limited progress in achieving asymmetric catalysis with chiral phosphines. In this report, the first highly enantioselective variant of the Kwon annulation of imines with allenes is described. Thus, C2-symmetric chiral phosphepine 1 serves as an effective catalyst for this powerful process, furnishing an array of functionalized piperidine derivatives with very good stereoselectivity
                                    尽管叔膦已成为非常通用的亲核催化剂,但在使用手性膦实现不对称催化方面取得的进展非常有限。在这份报告中,描述了
亚胺与
丙二烯的 Kwon 环化的第一个高度对映选择性变体。因此,C2 对称手性膦 1 作为这一强大过程的有效催化剂,提供了一系列具有非常好的立体选择性的官能化
哌啶衍
生物。