上游原料
(2S)-2-[(benzyloxy)methyl]-1,3-dioxolan-4-yl acetate(2S)-2-(hydroxymethyl)-1,3-dioxolan-4-yl acetate[(2S)-4-(acetoxy)-1,3-dioxolan-2-yl]methyl acetate5-[(E)-2-bromoethenyl]-2,4-bis[(trimethylsilyl)oxy]pyrimidine; 5-[(E)-2-bromoethenyl]-2-[(trimethylsilyl)oxy]-4-pyrimidinyl trimethylsilyl ether[(2S,4S)-4-[5-[(E)-2-bromoethenyl]-2,4-dioxo-3,4-dihydro-1(2H)-pyrimidinyl]-1,3-dioxolan-2-yl]methyl acetate[(2S,4R)-4-[5-[(E)-2-bromoethenyl]-2,4-dioxo-3,4-dihydro-1(2H)-pyrimidinyl]-1,3-dioxolan-2-yl]methyl acetate5-[(E)-2-bromoethenyl]-2,4(1H,3H)-pyrimidinedione(2R)-2-([[tert-butyl(dimethyl)silyl]oxy]methyl)-1,3-dioxolan-4-yl acetate5-[(E)-2-bromoethenyl]-1-[(2R,4S)-2-([[tert-butyl(dimethyl)silyl]oxy]methyl)-1,3-dioxolan-4-yl]-2,4(1H,3H)-pyrimidinedione
