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专利信息
专利号:US-9643932-B2
优先权日:2011-09-26
标 题:Process for the preparation of bendamustine hydrochloride
发明人:MISHRA BHUWAN BHASKAR; KACHHADIA NIKUNJ SHAMBHUBHAI; TOMAR VINOD SINGH; LAHIRI SASWATA
权利人:FRESENIUS KABI ONCOLOGY LTD
摘要: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 is industrially viable.