申请人:MINISTERO DELL' UNIVERSITA' E DELLA RICERCA SCIENTIFICA E TECNOLOGICA
                            
                            
                                公开号:EP0357565A2
                            
                            
                                公开(公告)日:1990-03-07
                            
                            
New process for the synthesis of the levodopa, L-(-)-2-amino-3-(3,4-dihydroxyphenyl)propionic acid, drug used in the treatment of the Parkinson's disease. The process consists in resolving with d-camphorsulfonic acid, or with a salt thereof,the d,l-2-amino-3-(3,4-dimethoxyphenyl)propionitrile, obtained from the 3,4-dimethoxyphenylacetaldehyde, and in the subsequent hydrolysis and methylation, by means of concentrated solutions of haloid acids, of the d-2-amino-3-(3,4-dimethoxyphenyl)propionitrile and of salts thereof.  
                            合成
左旋多巴(L-(-)-2-
氨基-3-(3,4-二羟基苯基)
丙酸)的新工艺,用于治疗帕
金森病。该工艺包括用 d-
樟脑磺酸或其盐溶解从 3,4-二
甲氧基苯乙醛中得到的 d,l-2-
氨基-
3-(3,4-二甲氧基苯基)丙腈,然后用卤酸的浓溶液对 d-2-
氨基-
3-(3,4-二甲氧基苯基)丙腈及其盐进行
水解和甲基化。