Abstract
Reaction of O-nucleosid-5′-yl (or 3′-yl) O-alkyl H-phosphonate diesters with L-lysine methyl ester dihydrochlorides in the presence of Et3N and CCl4 produced the corresponding Nα, Nγ- lysine linked 5′, 5′(or 3′, 3′)-dinucleotides in excellent yield.