Stereoselective synthesis of nucleoside monophosphate HepDirect™ prodrugs
作者:K. Raja Reddy、Serge H. Boyer、Mark D. Erion
DOI:10.1016/j.tetlet.2005.04.103
日期:2005.6
Synthesis of HepDirect™ prodrugs of nucleosidemonophosphates via phosphorylation with a chiral reagent forms a new asymmetric center at phosphorus and produces two diastereomers. Coupling of chiral phosphoramidite 6 derived from (S)-diol 5 with ara-A followed by oxidation of the intermediate phosphite gave ara-AMP prodrugs 8 (4S,2S isomer) and 9 (4S,2R isomer). Several methods were explored to identify