N2-<2-(4-nitrophenyl)ethoxycarbonyl>-O6-<2-(4-nitrophenyl)ethyl>-9-<3',5'-O-(1,1,3,3-tetraisopropyldisiloxane-1,3-diyl)-2'-O-<(trifluoromethyl)sulfonyl>-β-D-ribofuranosyl>guanine 在
叠氮化锂 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 48.0h,
以92%的产率得到{9-((2R,3S,3aS,9aR)-3-Azido-5,5,7,7-tetraisopropyl-tetrahydro-1,4,6,8-tetraoxa-5,7-disila-cyclopentacycloocten-2-yl)-6-[2-(4-nitro-phenyl)-ethoxy]-9H-purin-2-yl}-carbamic acid 2-(4-nitro-phenyl)-ethyl ester