Phosphoramidite used to incorporate a C-5 propyne modified dU either internally or at the 5' end of an oligonucleotide.

Phosphoramidite replacement for dT that enhances base-pairing.

Modified nucleoside synthon.

Nucleoside phosphoramidite useful in Click Chemistry reactions.

Useful phosphoramidite for the installation of 2'-deoxy-5-propynyl cytidine for stabilization of duplex and triplex nucleic acids.