Nucleotides, Part LX, Synthesis and Characterization of New 2′-O-Methylriboside 3′-O-Phosphoramidites Useful for the Solid-Phase Synthesis of 2′-O-Methyloligoribonucleotides
摘要:
A series of new 2'-O-methylribonucleoside 3'-O-[2-(4-nitrophenyl)ethyl dialkylphosphoramidites] 27-31, 33-38, 40-44, and 45-50 were synthesized and their stability and rc activity compared in automated oligonucleotide synthesis with the standard 2'-O-methylribonucleoside 3'-O-(beta-cyanoethyl diisopropylphosphoramidites) 32, 39, 45, and 51, respectively. The 2-(4-nitrophenyl)ethyl (npe) and 2-(3-nitrophenyl)ethoxycarbonyl (npeoc) groups were used for the protection of the base moieties.
Nucleotides. Part XLII. The 2-dansylethoxycarbonyl (= 2-{[5-(dimethylamino)naphthalen-1-yl]sulfonyl}ethoxycarbonyl; dnseoc) group for protection of the 5?-hydroxy function in oligoribonucleotide synthesis
作者:Frank Bergmann、Wolfgang Pfleiderer
DOI:10.1002/hlca.19940770209
日期:1994.3.23
The 2-dansylethoxycarbonyl (Dnseoc) group was employed for protection of the 5′-hydroxyfunction in oligoribonucleotidesynthesis by the phosphoramidite approach using the acid-labile tetrahydro-4-methoxy-2H-pyran-4-yl (Thmp) group for 2′-protection. The syntheses of monomeric building blocks, both phosphoramidites and nucleoside-functionalized supports, are described for the four common nucleosides