Asymmetric oxidation of enol phosphates to α-hydroxy ketones by (salen)manganese(III) complex. Effects of the substitution pattern of enol phosphates on the stereochemistry of oxygen transfer
作者:Marek Koprowski、Jerzy Łuczak、Ewa Krawczyk
DOI:10.1016/j.tet.2006.09.100
日期:2006.12
j and Z-configured enol phosphates containing aryloxy substituents in the phosphate group 2b, d, and h afforded optically active α-hydroxy ketones 4a–j of opposite configuration with good to high enantioselectivity. The influence of electronic and steric effects of the enol phosphate substituents on the stereoselectivity of oxidation was studied.
本文介绍了对各种不同取代的环状(E)和非环状(Z)-烯醇磷酸酯的对映选择性催化氧化的研究。无环(的不对称氧化Ž含有磷酸基团中的烷氧基取代基)烯醇磷酸盐2a中,Ç,ë -克,我和Ĵ和Ž -构型中含有磷酸基团的取代基的芳氧基烯醇磷酸盐2B,d,和^ h,得到光学活性α-羟基酮4a – j具有良好或高对映选择性的相反构型。研究了烯醇磷酸酯取代基的电子和空间效应对氧化的立体选择性的影响。