Enantiodivergent Approach to Trifluoromethylated Amines: A Concise Route to Both Enantiomeric Analogues of Calcimimetic NPS R-568
作者:Inmaculada Fernández、Victoria Valdivia、Ana Alcudia、Ahmed Chelouan、Noureddine Khiar
DOI:10.1002/ejoc.200901158
日期:2010.3
Reported herein is a straightforward and enantiodivergent synthesis of both enantiomers of trifluoromethylated analogues of calcimimetic NPS R-569 in a highly estereoselective manner. The synthesis features a diastereoselective synthesis of the N-(isopropylsulfinyl)imine unit by the "DAG methodology" and a diastereoselective addition of Ruppert-Prakash's reagent to the imine as the key steps. No protecting
本文报道了以高度酯选择性方式对拟钙剂 NPS R-569 的三氟甲基化类似物的两种对映异构体的直接和对映发散合成。该合成的特点是通过“DAG 方法”非对映选择性合成 N-(异丙基亚磺酰基)亚胺单元,并将 Ruppert-Prakash 试剂非对映选择性添加到亚胺中作为关键步骤。不需要保护基团,只需六个步骤即可进行原子经济合成。进行CF 3 阴离子与不同N-(异丙基亚磺酰基)亚胺的进一步加成反应以证明亚磺酰基取代基适合完美平衡反应性和非对映选择性。