Organocatalytic enantioselective conjugate addition–cyclization domino reactions of o-N-protected aminophenyl α,β-unsaturated aldehydes
作者:Seungpyeong Heo、Shinae Kim、Sung-Gon Kim
DOI:10.1016/j.tetlet.2013.07.031
日期:2013.9
useful tetrahydroquinolines has been developed through the asymmetric organocatalytic conjugate addition–cyclization reaction of malonates with o-N-protected aminophenyl α,β-unsaturated aldehydes using a diphenylprolinol TMS ether as an organocatalyst followed by reductive deoxygenation. This novel protocol allows for the formation of 4-substituted chiral tetrahydroquinolines, which are not easily accessible
通过使用二苯基脯氨醇TMS醚作为有机催化剂,通过丙二酸酯与oN保护的氨基苯基α,β-不饱和醛的丙二酸酯的不对称有机催化共轭加成-环化反应,开发了对生物有用的四氢喹啉的高度对映选择性合成。该新颖的方案允许形成4-取代的手性四氢喹啉,使用其他方法不易获得该4-取代的手性四氢喹啉,其具有高的产率和高的对映选择性(高达> 99%ee)。