在氧化还原中性条件下,用烯烃和水完成了多氟化亚氨基硫化物的可见光促进的位点选择性和直接C-F键官能化,提供了具有氟代和全氟烷基取代碳中心的多种γ-内酰胺。多种全氟烷基单元,包括C 2 F 5、C 3 F 7、C 4 F 9和C 5 F 11进行了位点选择性脱氟官能化。该方案允许高化学选择性控制并显示出优异的官能团耐受性。机理研究表明,脱氟过程中电子几何形状的显着变化扩大了底物和产物之间的氧化还原窗口,并确保了单C(sp 3 ) –F键断裂的化学选择性。
Enantioselective Copper-Catalyzed Reductive Coupling of Alkenylazaarenes with Ketones
作者:Aakarsh Saxena、Bonnie Choi、Hon Wai Lam
DOI:10.1021/ja3036916
日期:2012.5.23
Catalytic enantioselective methods for the preparation of chiral azaarene-containing compounds are of high value. By combining the utility of copper hydride catalysis with the ability of C=N-containing azaarenes to activate adjacent alkenes toward nucleophilic additions, the enantioselective reductive coupling of alkenylazaarenes with ketones has been developed. The process is tolerant of a wide variety of azaarenes and ketones, and provides aromatic heterocycles bearing tertiary-alcohol-containing side chains with high levels of diastereo- and enantioselection.