Directing the Stereoselectivity of the Claisen Rearrangement to Form Cyclic Ketones with Full Substitution at the α-Positions
作者:Fatimat O. Badmus、Raju S. Thombal、Satish Chandra Philkhana、Joshua A. Malone、Christian E. Bailey、Estefania Armendariz-Gonzalez、Edward W. Mureka、Cale M. Locicero、Frank R. Fronczek、Rendy Kartika
DOI:10.1021/acs.orglett.3c02752
日期:2023.10.27
We report an enantioselective synthesis of cyclic ketones with full substitutions at the α-positions in a highly diastereoselective manner. Our method is achieved by subjecting substrate motifs in 2-allyloxyenones to chiral organomagnesium reagents, which trigger the Claisen rearrangement upon direct 1,2-carbonyl addition. The observed diastereoselectivity of the allyl migration is proposed to originate
我们报道了以高度非对映选择性方式在 α 位完全取代的环酮的对映选择性合成。我们的方法是通过将 2-烯丙氧基烯酮中的底物基序置于手性有机镁试剂中来实现的,这会在直接 1,2-羰基加成时触发克莱森重排。所观察到的烯丙基迁移的非对映选择性被认为源自醇镁与烯丙氧基部分的分子内螯合。