Iridium-Catalyzed Highly Regioselective and Diastereoselective Allylic Etherification To Access <i>cis</i>-2,6-Disubstituted Dihydropyridinones
作者:Wangze Song、Ming Li、Nan Zheng、Karim Ullah、Junhao Li、Kun Dong、Yubin Zheng
DOI:10.1021/acs.joc.8b01598
日期:2018.10.19
A highly regio- and diastereoselective method to access cis-2,6-disubstituted dihydropyridinones under mild conditions by an iridium-catalyzed allylic etherification is reported. cis-2,6-Disubstituted dihydropyridinones are important precursors for the de novo synthesis of the corresponding piperidine alkaloids and iminosugars. This strategy features a broad substrate scope, high yields, and excellent
报道了一种高度区域选择性和非对映选择性的方法,该方法通过铱催化的烯丙基醚化反应在温和条件下获得顺式-2,6-二取代的二氢吡啶并酮。顺式-2,6-二取代的二氢吡啶并酮是从头合成相应的哌啶生物碱和亚氨基糖的重要前体。该策略具有广泛的底物范围,高收率以及出色的区域选择性和非对映选择性。该机理涉及π-烯丙基-Ir中间体。来自甲苯磺酰基的强A 1,3-菌株也可能在这种转化中有利于顺式产物的形成。