Enantioselective Aza-Henry Reaction of Imines Bearing a Benzothiazole Moiety Catalyzed by a<i>Cinchona</i>-Based Squaramide
作者:Hai-Xiao He、Wen Yang、Da-Ming Du
DOI:10.1002/adsc.201200957
日期:2013.4.15
efficient enantioselective aza‐Henry reaction of nitroalkanes to imines bearing a benzothiazole moiety catalyzed by a Cinchona‐based squaramide has been developed. In the reaction of imines, the corresponding products were obtained in good to excellent yields (up to 99%) with excellent enantioselectivities (up to >99% ee) for most of the aromatic substituted imines. The imines with electron‐withdrawing groups
已经开发了一种有效的对映选择性氮烷烃对氮苯-亨利反应,该反应由基于Cinchona的方酰胺催化的带有苯并噻唑部分的亚胺形成。在亚胺的反应中,对于大多数芳族取代的亚胺,以良好至优异的收率(高达99%)和优异的对映选择性(高达> 99%ee)获得了相应的产物。在氮杂-亨利反应中,具有吸电子基团的亚胺比带有供电子基团的亚胺具有更好的收率。此外,还开发了使用2-氨基苯并噻唑,醛和硝基甲烷的单锅三组分对映选择性氮杂-亨利反应。在单锅情况下获得了中等至良好的收率和高对映选择性(高达98%ee)。