Synthesis and Characterization of Metabolites and Potential Impurities of Lansoprazole, an Antiulcerative Drug
摘要:
Lansoprazole (Prevacid) is an antiulcerative drug used for the treatment of duodenal and gastric ulcers, reflux oesophagitis, and Zollinger-Ellison syndrome. During the bulk synthesis of lansoprazole, we have observed five impurities: lansoprazole N-oxide, lansoprazole sulfone N-oxide, lansoprazole sulfide, lansoprazole sulfone and N-aralkyl lansoprazole. The present work describes the synthesis and characterization of these impurities.
Method for preparing 2- (2-pyridinylmethylsulfinyl) benzimidazoles
申请人:Fan Chin-Tsai
公开号:US20090005570A1
公开(公告)日:2009-01-01
The present invention provides a method for preparing an antiulcer agent, 2-(2-pyridinylmethylsulfinyl)benzimidazoles, such as Omeprazole, Lansoprazole, Pantoprazole and Rabeprazole, which includes oxidizing an intermediate having a linkage of methylthio group (—CH
2
S—) to methylsulfinyl (—CH
2
S(O)—) in the presence of an oxidation catalyst of an alkali metal salt of tungstate at a temperature of 10-50° C.
Provided are an oral solid preparation composition, including a proton pump inhibitor or a pharmaceutically acceptable salt thereof; and a binding liquid including a basic additive, wherein a content of the basic additive is 2 to 13 parts by weight based on 100 parts by weight of the proton pump inhibitor or a pharmaceutically acceptable salt thereof; an oral solid preparation including the same; and a method of preparing the same. According to the present disclosure, an oral solid preparation exhibiting a significant reduction in the production of related substances and excellent stability against moisture and low pH is provided.
Efficient Synthesis of <i>N</i>‐Oxide Derivatives: Substituted 2‐(2‐(Pyridyl‐<i>N</i>‐oxide)methylsulphinyl)benzimidazoles
作者:Purna C. Ray、Vasantha Mittapelli、Amit Rohatgi、Om Dutt Tyagi
DOI:10.1080/00397910701470693
日期:2007.8.1
US7531666B2
申请人:——
公开号:US7531666B2
公开(公告)日:2009-05-12
[EN] ORAL SOLID PREPARATION COMPOSITION COMPRISING PROTON PUMP INHIBITOR, ORAL SOLID PREPARATION COMPRISING SAME, AND PREPARATION METHOD THEREFOR<br/>[FR] COMPOSITION POUR PRÉPARATION SOLIDE À USAGE ORAL COMPRENANT UN INHIBITEUR DE POMPE À PROTONS, PRÉPARATION SOLIDE À USAGE ORAL LA COMPRENANT, ET SON PROCÉDÉ DE PRÉPARATION<br/>[KO] 프로톤 펌프 저해제를 포함하는 경구용 고형제제 조성물, 이를 포함하는 경구용 고형제제 및 그 제조방법
申请人:LOTTE FINE CHEMICAL CO LTD
公开号:WO2019004770A2
公开(公告)日:2019-01-03
본 발명은 프로톤 펌프 저해제 또는 이의 약학적으로 허용 가능한 염; 및 염기성 첨가제를 포함하는 결합액;을 포함하되, 상기 염기성 첨가제의 함량은 상기 프로톤 펌프 저해제 또는 이의 약학적으로 허용 가능한 염 100중량부를 기준으로 2 ~ 13중량부인 것을 특징으로 하는 경구용 고형제제 조성물 및 이를 경구용 고형제제 및 그 제조방법에 관한 것이다. 본 발명에 따르면, 유연물질 생성이 현저히 감소되면서 수분 및 낮은 pH에 대한 안정성이 우수한 경구용 고형제제를 제공할 수 있다.