Process for the preparation of 2-(5-methoxyisochroman-1-yl)-4,5-dihydro-1H-imidazole and the hydrogensulfate salt thereof
申请人:ORION CORPORATION
公开号:US11352346B2
公开(公告)日:2022-06-07
The present disclosure relates to an improved process for the preparation of isochroman structured alpha2A adrenoceptor agonist, namely 2-(5-methoxyisochroman-1-yl)-4,5-dihydro-1H-imidazole of formula (I) and a pharmaceutically acceptable salts thereof, such as 2-(5-methoxyisochroman-1-yl)-4,5-dihydro-1H-imidazole hydrogensulfate of formula (Ia), and to a novel intermediate compound used in the process, namely N-(2-aminoethyl)-5-methoxyisochroman-1-carboxamide monohydrate of formula (V). Alpha2A agonists are useful in the treatment of anxiety, and for use as a sedative or analgesic agent, and other diseases where alpha2A agonism is desired.
本公开涉及异苯并吡喃结构的α2A肾上腺素受体激动剂,即式(I)的2-(5-甲氧基异苯并吡喃-1-基)-4,5-二氢-1H-咪唑及其药学上可接受的盐类的改进制备工艺,如式(Ia)的2-(5-甲氧基异苯并吡喃-1-基)-4,5-二氢-1H-咪唑氢硫酸盐、如式(Ia)的 2-(5-甲氧基异苯并二氢吡喃-1-基)-4,5-二氢-1H-咪唑氢硫酸盐,以及该工艺中使用的新型中间体化合物,即式(V)的 N-(2-氨基乙基)-5-甲氧基异苯并二氢吡喃-1-甲酰胺一水合物。α2A激动剂可用于治疗焦虑症、镇静或镇痛剂以及其他需要α2A激动的疾病。