Ts. Rao et al., SYNTHESIS OF TRIPLE-HELIX FORMING OLIGONUCLEOTIDES WITH A STRETCHED PHOSPHODIESTER BACKBONE, Nucleosides & nucleotides, 13(1-3), 1994, pp. 255-273
Total synthesis of novel DMT-phosphoramidites of thymidine (11 and 15)
and 2'-deoxyguanosine (8 and 20) have been accomplished. The utility
of these modified building blocks in the preparation of triple helix f
orming oligodeoxyribonucleotides with a stretched phosphodiester backb
one has been evaluated. It was found that the oligonucleotides with ex
tended backbones were unable to enhance the binding to duplex targets
containing CG or TA base pairs.