Influence of theN3-Protection Group onN1- vs.O2-Alkylation in the Mitsunobu Reaction
作者:Olaf R. Ludek、Chris Meier
DOI:10.1002/ejoc.200500801
日期:2006.2
The influence of the N3-protection group of thymine on the regioselectivity of the N1- vs. O2-alkylation under Mitsunobu conditions is described. A series of N3-protected thymine derivatives 8a–f was prepared and coupled to cyclopentanol as model compound for carbocyclic nucleoside precursors. Finally, the N3-BOM group was selected to improve our previously reported synthetic strategy to carbocyclic