Studies on transfer ribonucleic acids and related compounds. XLIV. A large-scale synthesis of the anticodon heptanucleotide of formyl-methionine transfer ribonucleic acid by using 2'-O-tetrahydrofuranylnucleosides.
2'-O-Tetrahydrofuranyl nucleosides were prepared by an improved procedure via 3', 5'-tetraisopropyldisiloxanylnucleosides. A large scale synthesis of the anticodon heptanucleotide C-U-C-A-U-A-A of E. coli formylmethionine tRNA was performed by the phosphotriester method involving condensation of oligonucleotides having 2'-O-tetrahydrofuranyl protecting groups.
A tritriacontanucleotide which has the sequence of the 5halfmolecule of E.coli glycine tRNA2, was synthesized by the phosphotriester method involving p-anisidate protection for the 3phosphate ends. Di- and trinucleotide units were prepared from 5dimethoxytrityl-2O-tetrahydrofuranyl-3́-O-(o-chlorophenyl)phosphoryl derivatives of uridine, N-benzoylcytidine, N-benzolyadenosine and N-iso-butyrylguanosine