Enantioselective and Regioselective Hydroetherification of Alkynes by Gold-Catalyzed Desymmetrization of Prochiral Phenols with P-Stereogenic Centers
作者:Yin Zheng、Linna Guo、Weiwei Zi
DOI:10.1021/acs.orglett.8b02982
日期:2018.11.16
The gold(I)-catalyzed enantioselective hydroetherification of alkynes was achieved via desymmetrization of prochiral bisphenols bearing P-stereogenic centers. (S)-DTBM-Segphos(AuCl)2/AgNTf2 proved to be a highly efficient catalyst system for this transformation, affording P-chiral cyclic phosphine oxides in good yields with high enantioselectivities (with up to 99% ee). The same catalyst system allowed
炔烃的金(I)催化的对映选择性水醚化是通过对带有P-立体异构中心的前手性双酚进行不对称化来实现的。(S)-DTBM-Segphos(AuCl)2 / AgNTf 2被证明是该转化的高效催化剂体系,以高收率和高对映选择性(高达99%ee)提供了P-手性环状氧化膦。相同的催化剂体系允许二酮的对映选择性脱对称。环化产物的合成转化提供了具有高对映体特异性的其他P-手性分子。