ethyl 4-(3-cyanopropyl)-piperazine-1-carboxylate 在
铑 作用下,
以
氨 、 乙醇 为溶剂,
25.0 ℃
、3.55 kPa
条件下,
以to obtain 20 g of ethyl 4-(4-aminobutyl)-piperazine-1-carboxylate with a boiling point of 126°-130° C. at 0.15 to 0.2 mm Hg的产率得到4-(4-氨基丁基)哌嗪-1-羧酸乙酯
参考文献:
名称:
Process for the preparation of triazoloquinazolinones
Process for the preparation of triazoloquinazolinones
申请人:Roussel Uclaf
公开号:US04390697A1
公开(公告)日:1983-06-28
A novel process for the preparation of triazoloquinazolinones of the formula ##STR1## wherein X is selected from the group consisting of hydrogen, fluorine, chlorine, bromine, --NO.sub.2, --CF.sub.3, --CH.sub.3 and --OCH.sub.3, n is an integer from 2 to 5, R.sub.1 and R.sub.2 are individually selected from the group consisting of hydrogen, alkyl of 1 to 5 carbon atoms and hydroxyalkyl of 1 to 5 carbon atoms or taken together with the nitrogen atom which they are attached form a saturated heterocycle optionally containing another heteroatom and optionally substituted with at least one member of the group consisting of hydroxy, alkyl and hydroxy alkyl of 1 to 5 carbon atoms, cycloalkyl of 3 to 6 carbon atoms, acyl of an aliphatic carboxylic acid of 1 to 5 carbon atoms, alkoxycarbonyl of 2 to 6 carbon atoms, aryl and aryl substituted with halogen or --CF.sub.3 and their non-toxic, pharmaceutically acceptable acid addition salts having antihistaminic and bronchospasmolytic activity and novel intermediates.