Solid support synthesis of oligothymidylates using phosphorochloridates and 1-alkylimidazoles - PubMed (original) (raw)
Solid support synthesis of oligothymidylates using phosphorochloridates and 1-alkylimidazoles
R C Pless et al. Nucleic Acids Res. 1975 Jun.
Free PMC article
Abstract
A study of the synthesis of oligothymidylates via phosphotriester intermediates on a polystyrene support is described. The sequence involves condensation of a phenyl nucleoside-3' -phosphorochloridate with the 5'-hydroxyl group of the carrier bound oligonucleotide derivative in the presence of 1-methylimidazole. Conditions for preparation of the phenyl nucleo-side phosphorochloridate as well as for the condensation on the support are discussed. d-TpTpTpT was obtained in 31% overall yield from carrier bound thymidine in one series of experiments, and d-TpTpTpTpT was obtained in 9% yield in another. The cycle for addition of one nucleotide unit can be completed in about six hours.
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