Efficient synthesis of nucleoside aryloxy phosphoramidate prodrugs utilizing benzyloxycarbonyl protection
作者:Jong Hyun Cho、Franck Amblard、Steven J. Coats、Raymond F. Schinazi
DOI:10.1016/j.tet.2011.05.046
日期:2011.7
An efficient method for the synthesis of nucleoside phosphoramidates prodrugs (6a-f) has been developed that employs a simple protection/deprotection sequence of the nucleoside with benzyloxycarbonyl (Cbz). The coupling reaction of Cbz-protected derivatives (5a-f) with phenyl-(ethoxy-L-alaninyl)-phosphorochloridate (7), followed by Cbz group removal by hydrogenolysis provided the phenyl phosphoramidate ProTides (6a-f) in excellent overall yields. (C) 2011 Elsevier Ltd. All rights reserved.