2-(4-nitrophenyl)ethyl tetraisopropylphosphorodiamidite 、
Acetic acid 2-{(2R,3R,4R,5R)-2-hydroxymethyl-5-{6-[2-(4-nitro-phenyl)-ethoxycarbonylamino]-purin-9-yl}-4-[2-(4-nitro-phenyl)-ethoxysulfonyloxy]-tetrahydro-furan-3-yloxy}-ethyl ester 在
四氮唑 作用下,
以
乙腈 为溶剂,
反应 3.0h,
以59%的产率得到Acetic acid 2-{(2R,3R,4R,5R)-2-{diisopropylamino-[2-(4-nitro-phenyl)-ethoxy]-phosphanyloxymethyl}-5-{6-[2-(4-nitro-phenyl)-ethoxycarbonylamino]-purin-9-yl}-4-[2-(4-nitro-phenyl)-ethoxysulfonyloxy]-tetrahydro-furan-3-yloxy}-ethyl ester