摘要:
The preparation of a peptide-oligonucleotide hybrid with an N-acylphosphoramidate linkage has been carried out by (i) phosphitylation of the C-terminal carboxamide of a protected peptide by reaction with a chloroalkoxy(dialkylamino)phosphine in the presence of a base, (ii) coupling of the resulting N-acylphosphorodiamidite onto an oligonucleotide-resin followed by oxidation, and (iii) deprotection and cleavage under basic conditions. The synthetic method takes advantage of the unprecedented reaction of primary carboxamides with electrophilic P-III species and takes place under mild conditions which are compatible with the stability of both the peptide and the oligonucleotide components.