Chiral Ion-Pair Organocatalyst-Promoted Efficient Enantio-selective Reduction of α-Hydroxy Ketones
作者:Yiliang Zhang、Li He、Lei Shi
DOI:10.1002/adsc.201800053
日期:2018.5.16
The enantioselective reduction of α‐hydroxy ketones with catecholborane has been developed employing 5 mol% of an 1,1′‐bi‐2‐naphthol (BINOL)‐derived ion‐pair organocatalyst. This methodology provides a straightforward access to the corresponding aromatic 1,2‐diols in high yields (up to 90%) with excellent enantioselectivities (up to 97%). Furthermore, the α‐amino ketones also could be reduced with
已经开发了使用5摩尔%的1,1'-联-2-萘酚(BINOL)衍生的离子对有机催化剂对儿茶酚硼烷对α-羟基酮的对映选择性还原。该方法可直接获得相应的芳族1,2-二醇,且收率很高(高达90%),对映选择性极好(高达97%)。此外,在温和的反应条件下,中等ee值也可以还原α-氨基酮。