N-benzyloxycarbonyl-1-β-D-ribofuranosyluracil-5-carboxamide 在
吡啶 、
4-二甲氨基吡啶 作用下,
以
乙腈 为溶剂,
生成 4-Methyl-thiobenzoic acid O-[(2R,3R,3aR,9aR)-2-(5-benzyloxycarbonylaminocarbonyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-5,5,7,7-tetraisopropyl-tetrahydro-1,4,6,8-tetraoxa-5,7-disila-cyclopentacycloocten-3-yl] ester