[EN] A METHOD OF PREPARING THE SCOPINE ESTER OF DI-(2-THIENYL)GLYCOLIC ACID, AN INTERMEDIATE IN THE SYNTHESIS OF TIOTROPIUM BROMIDE, AND ITS NEW FORM<br/>[FR] PROCÉDÉ DE PRÉPARATION DE L'ESTER DE SCOPINE DE L'ACIDE DI-(2- THIÉNYL)GLYCOLIQUE, UN INTERMÉDIAIRE DANS LA SYNTHÈSE DU BROMURE DE TIOTROPIUM, ET SA NOUVELLE FORME
申请人:ZENTIVA KS
公开号:WO2013135219A1
公开(公告)日:2013-09-19
The invention relates to a preparation method of the scopine ester of di-(2- thienyl)glycolic acid of formula I. The scopine ester of formula I is an important intermediate in the synthesis of tiotropium bromide, the substance with the chemical name (1R,2R,4S,5S,7S)-7-(2-hydroxy-2,2-di(thiophen-2-yl)acetoxy)-9,9-dimethyl-3- oxa-9-azatricyclo[3.3.1.02'4]nonan-9-ium bromide of formula II. The method consists of the following steps, reaction of scopine of formula III with derivatives of oxalic acid of formula XIII, wherein X means F, CI, Br, I, and R is X or O-terf-butyl, O-methyl, A/-pyrrolidinyl, N-morpholinyl and /V-imidazolyl, in the presence of a weak base and a catalyst in an inert organic solvent, producing the derivative of formula XIV; reaction of the derivative of formula XIV with at least 2 equivalents of 2- thienylmagnesium bromide of formula XV; and isolating the resulting scopine ester of formula I is then and crystallization from a crystallization solvent.
该发明涉及一种制备式I的二(2-噻吩基)乙酸的丙胺酯的方法。式I的丙胺酯是吡曲特罗溴化物合成中的重要中间体,该物质的化学名为(1R,2R,4S,5S,7S)-7-(2-羟基-2,2-二(噻吩-2-基)乙氧基)-9,9-二甲基-3-氧杂-9-氮杂三环[3.3.1.0^2,4]壬基溴化物,式II。该方法包括以下步骤,将式III的丙胺与式XIII的草酸衍生物在惰性有机溶剂中,在弱碱和催化剂的存在下反应,其中X表示F、Cl、Br、I,R为X或O-叔丁基、O-甲基、N-吡咯烷基、N-吗啉基和N-咪唑基,生成式XIV的衍生物;将式XIV的衍生物与至少2当量的式XV的2-噻吩基溴化镁反应;然后从结晶溶剂中结晶分离得到的式I的丙胺酯。