作者:Tsuneo Sato、Ryoji Noyori
DOI:10.1246/bcsj.56.2700
日期:1983.9
Lithium aluminium hydride reduction of methyl (2,3-O-isopropylidene-5-O-trityl-β-D-ribofuranosyl) acetate gives 2-(2,3-O-isopropylidene-5-O-trityl-β-D-ribofuranosyl)ethanol. Subsequent tosylation, displacement by cyanide ion, nitrile hydrolysis, and diazomethane methylation afford methyl 3-(2,3-O-isopropylidene-5-O-trityl-β-D-ribofuranosyl)propionate. The base-promoted formylation followed by methylation
氢化铝锂还原甲基 (2,3-O-isopropylidene-5-O-trityl-β-D-ribofuranosyl) 乙酸酯得到 2-(2,3-O-isopropylidene-5-O-trityl-β-D-呋喃核糖)乙醇。随后的甲苯磺酰化、氰化物离子置换、腈水解和重氮甲烷甲基化得到 3-(2,3-O-isopropylidene-5-O-trityl-β-D-ribofuranosyl)propionate 丙酸甲酯。碱促进甲酰化,然后用碘甲烷进行甲基化,形成 2-[(2,3-O-isopropylidene-5-O-trityl-β-D-ribofuranosyl)methyl]-3-甲氧基丙烯酸甲酯。甲氧基丙烯酸酯和尿素的碱催化缩合,然后脱保护产生 5-[(β-D-呋喃核糖基)甲基]尿嘧啶。以类似的方式,甲氧基丙烯酸酯与硫脲或胍缩合后,分别得到 5-[(β-D-呋喃核糖基)甲基]-2-硫尿嘧啶和