3'-tert-butyldimethylsilylthymidine 5'-carboxaldehyde 、
3'-deoxy-5'-O-(4,4'-dimethoxytrityl)-3'-piperazinothymidine 在
titanium(IV) isopropylate 、 sodium cyanoborohydride 作用下,
生成 1-[(2R,4S,5S)-5-[[bis(4-methoxyphenyl)-phenylmethoxy]methyl]-4-[4-[[(2R,3S,5R)-3-[tert-butyl(dimethyl)silyl]oxy-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-2-yl]methyl]piperazin-1-yl]oxolan-2-yl]-5-methylpyrimidine-2,4-dione