Investigation of a Facile Synthetic Method for Phosphorothioate Dimer Synthons In Oligonucleotide Phosphorothioates Synthesis
作者:Takanori Miyashita、Kohei Yamada、Kazuhiko Kondo、Kenya Mori、Kazuo Shinozuka
DOI:10.1080/15257770008033035
日期:2000.5
A facile synthetic method of a phosphorothioate dimer block was investigated. Dinucleoside phosphite triester intermediates were obtained in one-pot synthesis by the coupling of a protected nucleoside bearing free 5'-OH and a protected nucleoside bearing free 3'-OH in the presence of phosphorous trichloride (PCl3) and 1,2,4-triazole. The intermediates were easily sulfurized to afford the desired phosphorothioate dimer blocks in 33-64% overall yields.