It relates to a process for the preparation of nicotinamide riboside chloride of formula (I) wherein R1-R4 are as defined herein, comprising the following steps: a) reacting a riboside precursor wherein the hydroxyl groups at positions 1, 2, 3 and 5 of the ribose are protected with hydroxyl protective groups; with nicotinamide in the presence of a Lewis acid selected from SnCI4 and TiCI4 in an appropriate solvent, to give the corresponding protected nicotinamide riboside chloride compound, wherein the hydroxyl groups at positions 2, 3 and 5 are protected with hydroxyl protective groups; and b) removing the protective groups of the compound obtained in step a) to give a compound of formula (I). It also relates to a process for the preparation of the protected nicotinamide riboside chloride compound.
这是关于制备式(I)的烟酰胺核苷酸
氯化物的过程,其中R1-R4如此定义,包括以下步骤:a)在适当的溶剂中,在SnCI4和TiCI4选择的Lewis酸的存在下,将
核糖的1、2、3和5位羟基保护基保护的核苷酸前体与烟酰胺反应,以得到相应的保护烟酰胺核苷酸
氯化物化合物,其中2、3和5位的羟基被保护;b)去除步骤a)中得到的化合物的保护基,以得到式(I)的化合物。此外,还涉及制备保护烟酰胺核苷酸
氯化物化合物的过程。