会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 6. 发明专利
    • A NOVEL PROCESS FOR SYNTHESIS OF DEFERASIROX
    • IN2956MU2013A
    • 2015-07-03
    • IN2956MU2013
    • 2013-09-12
    • LUPIN LTD
    • ROY BHAIRAB NATHSINGH GIRIJ PALLATHI PIYUSH SURESHAGRAWAL MANOJ KUNJBIHARI
    • C07D249/08
    • The invention relates to metal mediated synthesis of Deferasirox 4-[3,5-bis(2-hydroxyphenyl)-lH-l,2,4-traizol-lyl] benzoic acid, [I], an iron chelating agent, synthesized from 1, 2, 4-triazole. The process involves Preparation of 3,5-dibromo-lH-l,2,4-traizole (II) from 1,2,4 triazole; reaction of compound (II) with benzyl bromide to form l-benzyl-3,5-dibromo-lH-l,2,4-traizoIe (III); reaction of compound (III) and (2-methoxyphenyl)boronic acid to give l-benzyl-3,5-bis[2-methoxyphenyl)-lH-l,2,4-traizole (IV); compound (IV) being reacted with suitable reactants to give compound (V); reacting compound (V) with (4-(methoxycarbonyl)phenyl)boronic acid to give compound (VI); and deprotection of compound (VI) to give compound [I]. A further process involves preparation of 3,5-dibromo lH-l,2,4triazole (II) from 1,2,4-traizoIe; reacting 3,5-dibromo lH-l,2,4triazole (II) and (4-(methoxycarbonyl)phenyI)boronic acid to form methyl 4-(3,5-dibromo-lH-l,2,4-triazol-l-yI)benzoate (VII) ; reaction of methyl 4-(3,5-dibromo-lH-l,2,4-triazol-l-yl)benzoate (VII) and (2-methoxyphenyl)boronic acid to form Synthesis of 4-(3,5-bis(2-methoxyphenyI)-lH-l,2,4-triazol-l-yl)benzoate (VI); deprotection of methyl 4-(3,5-bis(2-methoxyphenyl)-lH-l,2,4-triazol-l-yl)benzoate (VI) to form deferasirox (I). The invention also includes intermediates formed in the process of preparation of Deferasirox.