Jc. Bologna et al., The prooligonucleotide approach: Synthesis of mixed SATE-phosphotriester phosphodiester oligonucleotides, NUCLEOS NUC, 18(6-7), 1999, pp. 1433-1434
Synthesis of mixed SATE phosphotriester-phosphodiester prooligos was done f
ollowing two ways. Phosphodiesters were generated by selective beta-elimina
tion of cyanoethyl using DBU or were introduced with H-phosphonate chemistr
y.