The invention is concerned with a process for the preparation of a benzo[a]quinolizinone derivative of the formula ##STR1## by reacting a compound of the formula ##STR2## wherein X is halogen and Ph is phenyl, with carbon monoxide in the presence of a carbonylation catalyst and in the presence of (S)-3-ethoxypyrrolidine or a lower alkanol or water; where a lower alkyl ester of the 10-chloro-6,7-dihydro-4 -oxo-3-phenyl-4H-benzo[a]quinolizine-1-carboxylic acid has been obtained, converting this into the corresponding free acid; and, where the 10-chloro-6,7-dihydro-4-oxo-3-phenyl-4H-benzo[a]quinolizine-1-carboxylic acid has been obtained, reacting a reactive derivative thereof with (S)-3-ethoxypyrrolidine. The compound of formula I is useful for the treatment or prophylaxis of sleep disorders.
这项发明涉及一种制备苯并[a]喹诺利啉酮衍
生物的过程,其
化学式为##STR1##,通过将化合物的反应产物为##STR2##,其中X为卤素,Ph为苯基,与一种羰基化催化剂和
(S)-3-乙氧基吡咯烷或较低的烷醇或
水一起在碳一氧化物的存在下反应;其中已经获得了10-
氯-6,7-二氢-4-氧代-3-苯基-4H-苯并[a]喹诺利啉-1-
羧酸的较低烷基酯,将其转化为相应的自由酸;以及已经获得了10-
氯-6,7-二氢-4-氧代-3-苯基-4H-苯并[a]喹诺利啉-1-
羧酸,将其与
(S)-3-乙氧基吡咯烷反应。化合物的
化学式I对于治疗或预防睡眠障碍是有用的。