Isolation and Identification of Impurities in 4-Acetyl-2-(2′-hydroxyethyl)-5,6-bis(4-chlorophenyl)-2H-pyridazin-3-one, an Antihypertensive Agent
作者:Larry J. Powersx、David J. Eckert、Lane Gehrlein
DOI:10.1002/jps.2600700419
日期:1981.4
Three trace impurities found in 4-acetyl-2-(2'-hydroxyethyl)-5,6-bis(4-chlorophenyl)-2H-pyridazin-3-one (II), a novel antihypertensive agent, were isolated by a combination of low-pressure liquid chromatography and preparative TLC. These impurities were identified as the formate ester of II, a pyridazinone having a 2-methyl rather than the 2'-hydroxyethyl substituent, and a bis(pyridazinonyl)methane
通过组合分离在4-乙酰基-2-(2'-羟乙基)-5,6-双(4-氯苯基)-2H-哒嗪-3-酮(II)中发现的三种微量杂质液相色谱和制备薄层色谱的制备 这些杂质被鉴定为II的甲酸酯,具有2-甲基而不是2'-羟乙基取代基的哒嗪酮和双(吡啶并壬基)甲烷类似物。此外,通过高性能检测到了4-乙酰基5,6-双(4-氯苯基)-2H-哒嗪-3-酮(I)与碳酸亚乙酯的O-烷基化而不是N-烷基化的产物液相色谱。将这四种杂质的生物活性与II进行了比较。