The present invention relates to an improved process for the synthesis of bendamustine, in particular, bendamustine hydrochloride of the formula (VI) and its intermediate 1-Methyl-5-[bis(2-chloroethyl)amino]-1H-benzimidazol-2-yl]lithium butanoate of formula (V), both having a purity of ≧99%, which is simple, convenient, economical, does not use hazardous chemicals and industrially viable.
本发明涉及一种改进的
苯达莫司汀合成工艺,特别是
苯达莫司汀盐酸盐(
化学式(VI))及其中间体1-甲基-5-[双(2-
氯乙基)
氨基]-1H-
苯并咪唑-2-基]
锂丁酸酯(
化学式(V)),两者纯度≧99%,该工艺简单、方便、经济,不使用危险
化学品且具有工业可行性。