作者:Yu Sharov、Lei Zhang、Gui-Jie Du、Jian Ren、Mao-Sheng Cheng
DOI:10.3390/molecules13081817
日期:——
RP 48497 is a photodegradation product of eszopiclone, a non-benzodiazepine sedative-hypnotic used in the treatment of insomnia. We report herein the first synthesis of RP 48497 via reduction, chlorination, and recyclization of 6-(5-chloropyridin-2-yl)-7-hydroxy-6,7-dihydropyrrolo[3,4-b]pyrazin-5-one (3), a key intermediate in the synthesis of eszopiclone. The structure of RP 48497 was confirmed by its 1H-NMR and MS data. The mechanism of the reduction step in the synthesis of RP 48497 was also studied and the key parameters were determined. These findings should be important for quality control purposes in the manufacture of eszopiclone.
RP 48497 是埃佐匹克隆的光降解产物,埃佐匹克隆是一种用于治疗失眠症的非苯二氮卓镇静催眠药。我们在此报告了通过还原、氯化和再造 6-(5-氯吡啶-2-基)-7-羟基-6,7-二氢吡咯并[3,4-b]吡嗪-5-酮 (3) 而首次合成 RP 48497 的过程。1H-NMR 和 MS 数据证实了 RP 48497 的结构。此外,还研究了 RP 48497 合成过程中还原步骤的机理,并确定了关键参数。这些发现对于艾佐匹克隆生产过程中的质量控制具有重要意义。