| 摘要 |
<p>Novel 1-(cyanoalkyl)-4-guanylpiperazine acid salts are prepared by reacting novel 1-(cyanoalkyl)-piperazines with cyanamide in the presence of an acid. The novel 1-(cyanoalkyl)-4-guanylpiperazine acid salts are advantageously employed to prepare 1-(cyanoalkyl)-4-(2-pyrimidyl)piperazines by reacting them with malonaldehyde in an acidic medium which in turn are useful to prepare 8- ADomega- AD4-(2-pyrimidyl)-1-piperazinyl BDalkyl BD-8-azaspiro AD4.5 BDdecane-7,9-diones, such as buspirone. </p> |
