5-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-2-((trityloxy)methyl)tetrahydrofuran-3-carbaldehyde O-(((2R,3S,5R)-3-((tert-butyldiphenylsilyl)oxy)-5-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)tetrahydrofuran-2-yl)methyl) oxime 在
sodium cyanoborohydride 、
溶剂黄146 作用下,
以78%的产率得到1-[(2R,4R,5S)-4-[[[(2R,3S,5R)-3-[tert-butyl(diphenyl)silyl]oxy-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-2-yl]methoxyamino]methyl]-5-(trityloxymethyl)oxolan-2-yl]-5-methylpyrimidine-2,4-dione