2'-HALOBIPHENYL-4-YL INTERMEDIATES IN THE SYNTHESIS OF ANGIOTENSIN II ANTAGONISTS
申请人:Copar Anton
公开号:US20110105539A1
公开(公告)日:2011-05-05
A process for obtaining 2′-halo-4-methylbiphenyls is described, which comprises reacting 4 halotoluene with a 1,2-dihalobenzene in the presence of elemental metal such as magnesium, lithium or zinc, wherein 0 to 0.9 molar, particularly 0 to 0.2 molar excess of 4-halotoluene in regard to 1,2-dihalobenzene is used, and arised organometal intermediates are quenched by elemental mental halogen. In addition, the coupling of arised 2′-halo-4-methylbiphenyls with 2-(1-propyl)-4-methyl-6-(1′-methylbenzimidazole-2-il)benzimidazole to afford 3′-(2′-halo-biphenyl-4-ylmethyl)-1,7′-dimethyl-2′-propyl-1H,3′H-[2,5′]bibenzoimidazolyl, which can be further converted to organometallic compound and said organometallic compound is further reacted with formic acid derivative, such as N,N-dimethylformamide, alkylformiate or carbon dioxide to obtain telmisartan, is also described. Further described is use of in line analytics for monitoring the aforementioned reactions, process for preparing a pharmaceutical composition and/or dosage for, or use in preparing a medicament.
本文描述了一种制备2'-卤代-4-甲基联苯的方法,其中使用4-卤代甲苯和1,2-二卤代苯在镁、锂或锌等元素金属存在下反应,其中在1,2-二卤代苯中使用0至0.9摩尔,特别是0至0.2摩尔的4-卤代甲苯过量,并且生成的有机金属中间体通过元素金属卤素淬灭。此外,将生成的2'-卤代-4-甲基联苯与2-(1-丙基)-4-甲基-6-(1'-甲基苯并咪唑-2-基)苯并咪唑偶联,得到3'-(2'-卤代联苯-4-基甲基)-1,7'-二甲基-2'-丙基-1H,3'H-[2,5']双苯并咪唑基,可进一步转化为有机金属化合物,该有机金属化合物与甲酸衍生物(如N,N-二甲基甲酰胺、烷基甲酸酯或二氧化碳)反应,制备得到替米沙坦。此外,本文还描述了在线分析技术用于监测上述反应,以及制备药物组成物和/或剂量的方法,或用于准备药物的用途。