戊二酸-2-甲氨基-5-硝基单苯胺 以90.7的收率获得1-甲基-5-硝基-1H-苯并咪唑-2-丁酸乙酯 参考文献: Process For Preparation Of Intermediates Of Bendamustine[fr] Procédé De Préparation D'Intermédiaires De Bendamustine 标题: Process For Preparation Of Intermediates Of Bendamustine[fr] Procédé De Préparation D'Intermédiaires De Bendamustine 摘要:本发明涉及一种制备公式iv的4-{5-{双-(2-羟乙基)-氨基}-1-甲基-1H-苯并咪唑-2-基}-丁酸烷基酯的方法,该化合物是制备苯达莫司汀盐酸盐(I)的过程中的关键中间体.
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.
参考标题:Process For The Preparation Of Bendamustine Hydrochloride 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 Industrially Viable.