申请人:Consortium fur Elektrochemische Industrie GmbH
公开号:US05272270A1
公开(公告)日:1993-12-21
The invention relates to a process for the preparation of 1-alkyl-1,2,3,4-tetrahydroisoquinoline derivatives of the general formula ##STR1## The compounds can be used for the preparation of tetrahydroisoquinolines of the reticuline type, or of the norreticuline type, by reductive removal of the OH groups or, if they carry an acyl protective group on the nitrogen, for the preparation of isoquinolines of the papaverine type by acid-catalyzed hydrolysis with removal of the acyl groups and simultaneous removal of the hydroxyl groups. These 1-alkyl-1,2-dihydroisoquinoline derivatives can then be used for the preparation of isoquinolines of the papaverine type by aromatization by means of acids or hydrazine.
本发明涉及一种制备1-烷基-1,2,3,4-四氢异喹啉衍生物的方法,其通式为##STR1## 这些化合物可用于通过还原去除OH基团制备网状异喹啉或去网状异喹啉型,或者如果它们在氮上携带酰保护基,则可用于通过酸催化水解去除酰基和同时去除羟基制备吗啡啡型异喹啉的制备。这些1-烷基-1,2-二氢异喹啉衍生物随后可通过酸或肼的芳香化用于制备吗啡啡型异喹啉。