Expeditious convergent procedure for the preparation of bis(POC) prodrugs of new (E)-4-phosphono-but-2-en-1-yl nucleosides
摘要:
A series of unsaturated acyclonucleoside bis(POC) prodrugs of E configuration were synthesized through an expeditious, highly efficient and stereoselective one-step procedure from corresponding bis(POC)allylphosphonate through Ru catalyzed cross-coupling metathesis reaction. The [RuCl(2)(PCy(3))(SIPr)(Inde-nylidene)] and [RuCl(2)(PCy(3))(IMes)(benzylidene)] catalysts were employed; the unsaturated ANP were used bore C5-halovinyl uracil, C5-dihalovinyluracil or furanopyrimidine motifs. The chemical cleavage of biolabile (POC) group is a useful pathway to acid phosphonate derivatives. (C) 2011 Elsevier Ltd. All rights reserved.