7-bromo-4-methoxy-5-N-(2-trimethylsilylethoxy)methylpyrrolo[3,2-d]pyrimidine 、
5-O-tert-butyldimethylsilyl-1,N-dehydro-1,4-dideoxy-1,4-imino-2,3-O-isopropylidene-D-ribitol 在
正丁基锂 作用下,
以
hexanes 、
乙醚 、
苯甲醚 为溶剂,
生成 (1S)-5-O-tert-butyldimethylsilyl-1,4-dideoxy-1,4-imino-2,3-isopropylidene-1-C-{4-methoxy-5-N-(2-trimethylsilyl)ethoxymethylpyrrolo[3,2-d]pyrimidin-7-yl}-D-ribitol