The present invention provides for compounds of Formulas I-III, and salts thereof,
wherein n, m, R
1
, R
2
, R
3
, and R
4
have any of the values defined there for in the specification. The compounds of formula I may be used in the synthesis of oligonucleotides such as compounds of formula II (bearing a 3′-thiol) or formula III (bearing a 3′-disulfide).
本发明提供了I-III式化合物及其盐,其中n,m,R1,R2,R3和R4在说明书中定义的任何值。公式I的化合物可用于合成寡核苷酸,如公式II(带有3'-
硫)或公式III(带有3'-二
硫键)的化合物。