Fused carbocyclic ring derivatives of pyridine which contain a nitrile or thioamide group on the carbocyclic ring e.g. 8-cyano or thiocarboxamido-5,6,7,8-tetrahydro- quinolines are prepared by a process in which a sodium, potassium, lithium or magnesium halide derivative of the pyridine compound is treated with a compound RaRbNCN wherein Ra and Rb are the same or different and represent alkyl, cycloalkyl, or aralkyl, or Ra and Rb are joined to form a heterocyclic ring with the nitrogen, and the product is treated with a proton source to obtain the nitrile which is optionally treated with a sulphurising agent to form the thioamide. The nitriles or thioamides may be isolated as their acid addition salts.
在碳环上含有腈基或
硫酰胺基团的
吡啶碳环衍
生物,例如8-
氰基或
硫代羧酰胺基-5,6,7,8-四氢-
喹啉的制备方法是:将
吡啶化合物的
钠、
钾、
锂或
镁卤化物衍
生物与化合物 RaRbNCN 一起处理,其中 Ra 和 Rb 可以相同或不同,代表烷基、环烷基或芳烷基,或 Ra 和 Rb 代表环烷基或芳烷基、环烷基或芳烷基,或者 Ra 和 Rb 与氮连接形成杂环,然后用质子源处理产物,得到腈,再用
硫化剂处理形成
硫代酰胺。腈或
硫代酰胺可以作为它们的酸加成盐分离出来。