Quinine, quinidine and analogs thereof, are prepared by reacting a 4-quinolyllithium compound with a 4,5-erythro-5-ethyl(or vinyl)-quinuclidine-2.epsilon. -carboxaldehyde or the corresponding quinuclidine-2-carboxylic acid alkyl ester. Also described, inter alia, is the preparation of a 4,5-erythro-5-ethyl(or vinyl)-quinuclidine-2.epsilon.-carboxaldehyde, and a 4,5-crythro-5-ethyl(or vinyl)-quinuclidine-2.epsilon. -carboxylic acid and esters thereof. The end products are useful as antimalarial and antiarrhythmic agents.
奎宁、
奎尼丁及其类似物是通过将4-喹诺林
锂化合物与4,5-内消旋-5-乙基(或
乙烯基)喹曲啶-2.ε.-羧醛或相应的喹曲啶-2-
羧酸烷基酯反应制备的。此外,还描述了4,5-内消旋-5-乙基(或
乙烯基)喹曲啶-2.ε.-羧醛和4,5-外消旋-5-乙基(或
乙烯基)喹曲啶-2.ε.-
羧酸及其
酯类的制备方法。最终产品可用作抗疟疾和
抗心律失常药物。