The Addition Reaction of Samarium Enolates and 2-Haloenolates Derived from Esters, and Amides to Imines. Totally Stereoselective Synthesis of Enantiopure 3,4-Diamino Esters or Amides
作者:Joséâ
M. Concellón、Humberto RodrÃguez-Solla、Carmen Simal、Vicente del Amo、Santiago GarcÃa-Granda、M. Rosario DÃaz
DOI:10.1002/adsc.200900534
日期:2009.11
addition reaction of samarium enolates and 2-haloenolates derived from esters and amides to imines takes place in an efficient manner. A novel protocol to perform the addition reaction of samarium enolates derived from esters or amides to chiral 2-aminoimines, with total stereoselectivity and without racemization, is also reported. The use of samarium enolates in place of other classic metallic enolates
衍生自酯和酰胺的烯醇盐和2-卤代烯醇盐以有效的方式发生加成反应。还报道了一种新颖的方案,该方案可以进行酯或酰胺衍生的烯醇sa到手性2-氨基亚胺的加成反应,该反应具有总的立体选择性且没有消旋作用。当需要低碱性的烯醇盐时,使用sa烯醇盐代替其他经典的金属烯醇盐(锂,镁等)可能是获得对映纯3,4-二氨基酯或酰胺的有价值的选择。