ethyl 5-(N,N-diacetylamino)-1-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)-2-methylimidazole-4-carboxylate 在
N-溴代丁二酰亚胺(NBS) 作用下,
以
四氯化碳 为溶剂,
反应 1.0h,
以60%的产率得到ethyl 5-(N,N-diacetylamino)-1-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)-2-bromomethylimidazole-4-carboxylate