A novel 4-cyanopiperidine derivative, which is represented by the following general formula (I): ##STR1## wherein X means a halogen atom, or an acid addition salt thereof, is prepared by reacting N-(2-hydroxyethyl)-4-carbamoylpiperidine or an acid addition salt thereof with a dehydrating and halogenating agent; or by reacting 4-cyanopiperidine or a salt thereof with a compound represented by the following general formula (IV): X--CH.sub.2 CH.sub.2 --Y (IV) wherein X has the same meaning as defined above and Y denotes the same halogen atom as X or another halogen atom. The derivative is useful as intermediate for synthesis of quinuclidine derivative which is in turn useful as intermediate for the production of medicines, chemicals, etc.
一种新型的
4-氰基哌啶衍
生物,其表示为以下一般式(I):##STR1## 其中X表示卤素原子,或其酸盐,通过将N-(2-羟乙基)-
4-氨基哌啶或其酸盐与脱
水和卤代试剂反应制备;或通过将
4-氰基哌啶或其盐与以下一般式(IV)所代表的化合物反应制备:X--CH.sub.2 CH.sub.2 --Y (IV) 其中X具有上述定义的相同含义,Y表示与X相同的卤素原子或另一个卤素原子。该衍
生物可用作
喹啉衍
生物的合成中间体,而
喹啉衍
生物又可用作药物、
化学品等的生产中间体。