O7-(
tert-butyl-dimethyl-silanyl)-
O4,
O5-isopropylidene-
D-
allo-3,6-anhydro-[2]heptulosonic acid methyl ester semicarbazone 在
sodium ethanolate 作用下,
以
乙醇 为溶剂,
生成
6-<2,3-O-isopropylidene-5-O-(t-butyldimethylsilyl-β-D-ribofuranosyl)>-1,2,4-triazine-3,5(2H,4H)-dione