2-氯甲基-3,5-二甲基-4-硝基吡啶 、 2-巯基-5-甲氧基苯并咪唑 以to get 5-methoxy-2-(((3,5-dimethyl-4-nitro-2-pyridinyl)methyl)thio)-1H-benzimidazole of formula-VIII的产率得到5-甲氧基-2-(((3,5-二甲基-4-硝基-2-吡啶)甲基)硫代)-1H-苯并咪唑
参考文献:
名称:
Intermediates and an improved process for the preparation of Omeprazole employing the said intermediates
[EN] NEW METHOD FOR THE PREPARATION OF THE ANTI-ULCER COMPOUNDS OMEPRAZOLE, LANSOPRAZOLE AND PANTOPRAZOLE [FR] NOUVEAU PROCEDE DE PREPARATION DES COMPOSES ANTIULCEREUX OMEPRAZOLE, LANSOPRAZOLE ET PANTOPRAZOLE
The process starts by reacting 2,3,5 trimethylpyridine with hydrogen peroxide in the presence of catalysts, giving new reactive ionic species allowing the number of required steps to be substantially reduced. In the final important step, oxidation to omeprazol, there are used new salts of 5-methoxy-2-((3,5-dimethyl-4-methoxy-2-pyridine)methylthio)-1H-benzimidazole which, as the oxidation evolves, precipitate the omeprazol. The new oxidation method avoids superoxidations, provide for faster oxidation, high purity and yields of over 90%.
NEW GINKGOLIDE DERIVATIVES AND A PROCESS FOR PREPARING THEM
申请人:SUNKYONG INDUSTRIES CO., LTD.
公开号:EP0737195A1
公开(公告)日:1996-10-16
US5541183A
申请人:——
公开号:US5541183A
公开(公告)日:1996-07-30
US6303787B1
申请人:——
公开号:US6303787B1
公开(公告)日:2001-10-16
[EN] NEW GINKGOLIDE DERIVATIVES AND A PROCESS FOR PREPARING THEM<br/>[FR] NOUVEAUX DERIVES DE GINKGOLIDE ET LEUR PROCEDE DE PREPARATION
申请人:SUNKYONG INDUSTRIES CO., LTD.
公开号:WO1995018131A1
公开(公告)日:1995-07-06
(EN) The present invention is directed to new ginkgolide derivatives, which may be used for the prevention or treatment of various PAF-induced diseases, and the pharmaceutical uses of theses derivatives. The present invention is also directed to a process for preparing these ginkgolide derivatives.(FR) Cette invention a pour objet de nouveaux dérivés de ginkgolide qu'on peut utiliser pour prévenir ou traiter diverses maladies induites par le facteur d'activation des plaquettes (PAF), les utilisations pharmaceutiques de ces nouveaux procédés dérivés de ginkgolide ainsi qu'un procédé de préparation de ces derniers.