2N-(N,N-dimethylaminomethylidene)-9-formyl-1N-(pivaloyloxy)methyl-9-deazaguanine 、
(5S,6R)-6-amino-2,2-dimethyl-1,3-dioxepan-5-ol 在
三乙酰氧基硼氢化钠 、 magnesium sulfate 作用下,
以
1,2-二氯乙烷 为溶剂,
以92%的产率得到(2-[(dimethylamino)methyleneamino]-7-{[(5R,6S)-6-hydroxy-2,2-dimethyl-1,3-dioxepan-5-ylamino]methyl}-4-oxo-4,5-dihydro-3H-pyrrolo[3,2-d]pyrimidin-3-yl)methyl pivalate