Diastereoselective Synthesis of 4-Hydroxypiperidin-2-ones via Cu(I)-Catalyzed Reductive Aldol Cyclization
作者:Hon Wai Lam、Gordon J. Murray、James D. Firth
DOI:10.1021/ol052599j
日期:2005.12.1
[chemical reaction: see text]. 4-Hydroxypiperidin-2-ones may be prepared in highly diastereoselective fashion using a Cu(I)-catalyzed reductive aldol cyclization of alpha,beta-unsaturated amides with ketones. Used in combination with proline-catalyzed asymmetric Mannich reactions, this methodology enables the enantioselective synthesis of more highly functionalized piperidin-2-ones and hydroxylated
[化学反应:见正文]。可以使用Cu(I)催化的α,β-不饱和酰胺与酮的Cu(I)催化还原性羟醛环化,以高度非对映选择性的方式制备4-羟基哌啶-2-酮。与脯氨酸催化的不对称曼尼希反应结合使用,该方法可以对映选择性合成更多高度官能化的哌啶-2-酮和羟基化哌啶。