Dynamic Kinetic Resolution of Racemic γ-Aryl-δ-oxoesters. Enantioselective Synthesis of 3-Arylpiperidines
作者:Mercedes Amat、Margalida Cantó、Núria Llor、Carmen Escolano、Elies Molins、Enrique Espinosa、Joan Bosch
DOI:10.1021/jo025894f
日期:2002.7.1
affords bicyclic delta-lactams, in a process that involves a dynamic kinetic resolution. Subsequent reduction of these lactams leads to enantiopure 3-arylpiperidines. Starting from racemic aldehyde esters, this short sequence has been applied to the synthesis of (R)-3-phenylpiperidine and the antipsychotic drug (-)-3-PPP (an (S)-3-arylpiperidine), whereas starting from racemic ketone esters enantiopure
外消旋的γ-芳基-δ-氧代酸酯与(R)-或(S)-苯基甘醇立体立体环选择性地生成双环δ-内酰胺,其过程涉及动态动力学拆分。这些内酰胺的随后还原导致对映体纯的3-芳基哌啶。从外消旋醛酯开始,此短序列已应用于(R)-3-苯基哌啶和抗精神病药(-)-3-PPP((S)-3-芳基哌啶)的合成,而从外消旋酮开始制备对映体纯的顺式-2-烷基-3-芳基哌啶酯。