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  • Title: Studies on transfer ribonucleic acids and related compounds. XLV. Block condensation of ribooligonucleotides containing 2'-O-tetrahydrofuranyl-5'-O-dimethoxytritylnucleosides.
    Author: Ohtsuka E, Yamane A, Ikehara M.
    Journal: Nucleic Acids Res; 1983 Mar 11; 11(5):1325-35. PubMed ID: 6828384.
    Abstract:
    2'-O-Tetrahydrofuranyl-5'-O-dimethoxytrityl-N-protected nucleosides were phosphorylated to give the 3'-(o-chlorophenyl) phosphates which were then condensed with 3',5'-unprotected nucleosides to elongate the chain in the 3'-direction. The 5'-dimethoxytrityl group of these oligonucleotides was selectively deblocked by treatment with zinc bromide. The rate of removal of the dimethoxytrityl group differed in each nucleotide. A dodecamer containing a termination codon UAG, U(AGU)3AG, was synthesized by elongating the chain in the 5'-direction using the selective dedimethoxytritylation followed by condensation of protected oligonucleotide blocks.
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