Propargylethoxyamino nucleosides are disclosed having the structure
1
wherein R
1
and R
2
are —H, lower alkyl, or label; B is a 7-deazapurine, purine, or pyrimidine nucleoside base; W
1
is —H or —OH; W
2
is —OH or a moiety which renders the nucleoside incapable of forming a phosphodiester bond at the 3′-position; and W
3
is
—PO
4
, —P
2
O
7
, —P
3
O
10
, phosphate analog, or —OH. Additionally, a primer extension method is provided employing the above propargylethoxyamino nucleosides.
Propargylethoxyamino nucleosides are disclosed having the structure
wherein R
1
and R
2
are —H lower alkyl, or label; B is a 7-deazapurine, purine, or pyrimidine nucleoside base; W
1
is —H or —H; W
2
is —H or a moiety which renders the nucleoside incapable of forming a phosphodiester bond at the 3′-position; and W
3
is —PO
4
, —P
2
O
7
, —P
3
O
10
, phosphate analog, or —OH. Additionaly, a primer extension method is provided employing the above propargylethoxyamino nucleosides.