A process for making clofarabine comprising: fluorinating a compound of formula VII
wherein each R
4
is independently a hydroxy protecting group, OR
6
is a leaving group, with a fluorinating agent in the presence of guanidine carbonate to give a compound of formula VIII:
wherein R
4
is as defined above; and deprotecting the compound of formula VIII to give the clofarabine.
制备克洛法宾的过程包括:在
氰基
碳酸盐存在下,用
氟化剂
氟化
化学式VII的化合物,其中每个R4分别是一个羟基保护基,OR6是一个脱离基,以得到
化学式VIII的化合物:其中R4如上定义;然后去保护
化学式VIII的化合物以获得克洛法宾。