作者:Michał Michalak、Maciej Stodulski、Sebastian Stecko、Adam Mames、Irma Panfil、Magdalena Soluch、Bartłomiej Furman、Marek Chmielewski
DOI:10.1021/jo2010846
日期:2011.8.19
A formal synthesis of a powerful cholesterol inhibitor, ezetymibe 1, is described. The crucial step of the synthesis is based on Cu(I)-mediated Kinugasa cycloaddition/rearrangement cascade reaction between terminal acetylene derived from acetonide of l-glyceraldehyde and suitable C,N-diarylnitrone. The adduct with (3R,4S) configuration at the azetidinone ring, obtained with high stereoselectivity,
描述了一种功能强大的胆固醇抑制剂ezetymibe 1的正式合成。合成的关键步骤是基于Cu(I)介导的Kinugasa环加成/重排的级联反应,该级联反应是由1-甘油醛的乙炔化物衍生的末端乙炔与合适的C,N-二芳基亚硝基之间进行的。随后将具有高立体选择性的在氮杂环丁酮环上具有(3 R,4 S)构型的加合物进行二醇侧链的脱保护反应,然后进行羟基裂解并在C3碳原子处进行碱诱导的异构化反应,得到(3小号,4小号)醛,先灵P雅小组已将其转变为依泽替米贝。