Efficient asymmetric synthesis of trifluoromethylated β-aminophosphonates and their incorporation into dipeptides
作者:Kostiantyn V. Turcheniuk、Kateryna O. Poliashko、Valery P. Kukhar、Alexander B. Rozhenko、Vadim A. Soloshonok、Alexander E. Sorochinsky
DOI:10.1039/c2cc36702e
日期:——
Addition of anions derived from dialkyl methylphosphonates to (Ss)-N-tert-butanesulfinyl (3,3,3)-trifluoroacetaldimine afforded (Ss,R) addition adducts in moderate to good yield (53â75%) with excellent diastereoselectivity (94â95% de). After selective removal of the N-sulfinyl group, dipeptides containing enantiomerically pure diethyl 2-amino-3,3,3-trifluoropropylphosphonate were synthesized to investigate the influence of the trifluoromethyl substituent on N-terminal coupling.
将二烷基甲基膦酸酯衍生的阴离子加成到(Ss)-N-叔丁磺酰基(3,3,3)-三氟乙醛亚胺上,以中等至良好的收率(53-75%)得到了具有优异立体选择性(94-95% 对映体过量)的(Ss,R)加成物。在选择性去除N-磺酰基后,合成了含有手性纯二乙基2-氨基-3,3,3-三氟丙基膦酸酯的二肽,以研究三氟甲基取代基对N-端偶联的影响。