乙酸酐 、
2-(N,N-dibutylaminomethylidene)amino-6-[2-deoxy-5-O-(4,4'-dimethoxytrityl)-β-D-ribofuranosyl]-7-hydroxy-1,8-naphthyridine 在
吡啶 作用下,
反应 6.0h,
以85%的产率得到2-(N,N-dibutylaminomethylidene)amino-6-[2-deoxy-3-O-acetyl-5-O-(4,4'-dimethoxytrityl)-β-D-ribofuranosyl]-7-hydroxy-1,8-naphthyridine