<i>C</i><sub>2</sub>-Symmetric Recyclable Organocatalyst for Enantioselective Strecker Reaction for the Synthesis of α-Amino Acid and Chiral Diamine- an Intermediate for APN Inhibitor
作者:S. Saravanan、Arghya Sadhukhan、Noor-ul H. Khan、Rukhsana I. Kureshy、Sayed H. R. Abdi、Hari C. Bajaj
DOI:10.1021/jo300349f
日期:2012.5.4
Recyclable chiral amide-based organocatalyst 5 efficiently catalyzed asymmetric Strecker reaction of various aromatic and aliphatic N-benzhydrylimines with ethyl cyanoformate as cyanide source at −10 °C to give a high yield (95%) of α-aminonitriles with excellent chiral induction (ee, up to 99%) with the added advantage of recyclability. Based on experimental observations a probable mechanism was proposed
可循环使用的基于手性酰胺的有机催化剂5在-10°C下有效催化了各种芳族和脂肪族N-苯甲酰亚胺与氰基甲酸乙酯作为氰化物源的不对称Strecker反应,从而获得了高收率(95%)的α-氨基腈,具有出色的手性诱导作用(ee ,最高可达99%),并具有可回收性的额外优势。基于实验观察,提出了该反应的可能机理。具有催化剂5的该方案被扩展用于以高产率和高对映选择性合成(R)-苯丙氨酸和药学上重要的药物中间体(R)-3-苯基丙烷-1,2-二胺。