Carbonisotope labeling is a traceless technology, which allows tracking the fate of organic compounds either in the environment or in living organisms. This article reports on a general approach to label urea derivatives with all carbonisotopes, including 14C and 11C, based on a Staudinger aza-Wittig sequence. It provides access to all aliphatic/aromatic urea combinations.
碳同位素标记是一种无痕技术,可以跟踪环境或生物体中有机化合物的命运。本文报告了基于 Staudinger aza-Wittig 序列用所有碳同位素(包括14 C 和11 C)标记尿素衍生物的一般方法。它提供了对所有脂肪族/芳香族尿素组合的访问。
US5276042A
申请人:——
公开号:US5276042A
公开(公告)日:1994-01-04
[EN] PROCESS FOR PREPARING PAROXETINE HYDROCHLORIDE HEMIHYDRATE<br/>[FR] PROCEDE DE PREPARATION DE SEMI-HYDRATE DE CHLORHYDRATE DE PAROXETINE
申请人:JUBILANT ORGANOSYS LTD
公开号:WO2007054978A2
公开(公告)日:2007-05-18
[EN] Disclosed herein a process for the preparation of crystalline paroxetine hydrochloride in hemihydrate form employing a selective solvent system to achieve stable and non- hygroscopic form which is easy to prepare and convenient to operate on commercial scale. [FR] La présente invention concerne un procédé de préparation de chlorhydrate de paroxétine cristallin sous forme de semi-hydrate à l'aide d'un système solvant sélectif en vue d'obtenir une forme stable et non hygroscopique, facile à préparer et d'utilisation commode à l'échelle commerciale.
Piperidine compositions and their preparation and use