Process for preparing 2-[(pyridinyl)methyl]sulfinyl-substituted benzimidazoles and novel chlorinated derivatives of pantoprazole
申请人:Braude Viviana
公开号:US20050075370A1
公开(公告)日:2005-04-07
The present invention provides a process comprising admixing a thioether with about 1.05 to about 1.6 molar equivalents of an active chlorine-containing oxidant, preferably sodium hypochlorite, and about 2.5 to about 5.0 molar equivalents of an alkali metal base; and recovering a sulfoxide that is preferably pantoprazole, lansoprazole, omeprazole, or rabeprazole. The process may further comprise contacting the sulfoxide with a source of sodium ions, preferably sodium hydroxide, to produce the sodium salt of the sulfoxide. The invention also relates to novel chlorinated derivatives of pantoprazole including 5-(difluoromethoxy)-2-[[(3,4-dimethoxy-2-pyridinyl)-chloromethyl]sulfinyl]-1H-benzimidazole and 5-(difluoromethoxy)-2-[[(3,4-dimethoxy-2-pyridinyl)-chlorohydroxymethyl]sulfinyl]-1H-benzimidazole and processes for making them. The invention also relates to processes of quantifying and identifying a compound other than pantoprazole in a mixture of pantoprazole and at least one other compound.
本发明提供了一种工艺,包括将硫醚与大约1.05到大约1.6摩尔当量的活性含氯氧化剂(优选为次氯酸钠)和大约2.5到大约5.0摩尔当量的碱金属碱混合;并回收一种亚砜,该亚砜优选为泮托拉唑、兰索拉唑、奥美拉唑或雷贝拉唑。该工艺还可以进一步包括将亚砜与钠离子源(优选为氢氧化钠)接触,以产生亚砜的钠盐。本发明还涉及泮托拉唑的新型氯化衍生物,包括5-(二氟甲氧基)-2- [[(3,4-二甲氧基-2-吡啶基)-氯甲基]亚砜基] -1H-苯并咪唑和5-(二氟甲氧基)-2- [[(3,4-二甲氧基-2-吡啶基)-氯羟甲基]亚砜基] -1H-苯并咪唑及其制备工艺。本发明还涉及在泮托拉唑和至少一种其他化合物的混合物中定量和鉴定泮托拉唑以外的化合物的工艺。