Abstract
In this study, we developed new 3′-terminal deoxyribonucleoside-loading reagents 1 with a new silyl-type linker. These reagents could increase the efficiency of introduction of 3′-terminal deoxyribonucleoside components into polymer supports to a level of 17–29 μmol/g. The efficiency was higher than that of previous T-loading reagents because reagents 1 contain a 4-aminobutyryl residue as a spacer. Moreover, we could synthesize not only unmodified DNA oligomers but also a base-labile modified DNA oligomer using resins 9a– d in the activated phosphite method without base protection.
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