2',3'-O-isopropylidene-5-methoxycarbonylmethyl-2-thiouridine 、
1,2-dibenzoyldiazene 以
1,4-二氧六环 、
水 为溶剂,
以26%的产率得到[1-((3aR,4R,6R,6aR)-6-Hydroxymethyl-2,2-dimethyl-tetrahydro-furo[3,4-d][1,3]dioxol-4-yl)-4-oxo-1,4-dihydro-pyrimidin-5-yl]-acetic acid methyl ester