5'-O-(Methoxytrityl)thymidine 3'-<2-cyanoethyl S-(dimethylthiocarbamoyl)thiophosphate> 在
苯磺酸 作用下,
以
1,4-二氧六环 、
甲醇 为溶剂,
反应 0.42h,
以88%的产率得到(2-cyanoethyl ((2R,3S,5R)-2-(hydroxymethyl)-5-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)tetrahydrofuran-3-yl) phosphoric) dimethylcarbamothioic thioanhydride