developed to prepare various N-(arylethyl)piperazine-2,6-diones from 4-benzenesulfonyliminodiacetic acid and primary amines using carbonyldiimidazole in the presence of a catalytic amount of DMAP at ambient temperature. Piperazine-2,6-diones are successfully transformed to pharmaceutically useful pyridopyrazines or pyrazinoisoquinolines and ene-diamides via an imide carbonyl group activation strategy using
4-BENZYL-1-PHENETHYL-PIPERAZINE-2,6-DIONE PREPARATION METHOD, AND INTERMEDIATE AND PREPARATION METHOD THEREOF
申请人:SHANGHAI INSTITUTE OF PHARMACEUTICAL INDUSTRY
公开号:US20160130218A1
公开(公告)日:2016-05-12
The present invention provides a key new intermediate (a compound of formula III) of 4-benzyl-1-phenethyl-piperazine-2,6-dione (formula IV compound), a pharmaceutically acceptable salt thereof and a preparation method thereof. The present invention additionally discloses a method for preparing 4-benzyl-1-phenethyl-piperazine-2,6-dione (formula IV compound) from the formula III compound, said method overcoming the shortcomings of current formula IV compound preparation methods, such as low production volumes, low purity, high energy consumption, high costs, and inability to achieve industrialized production, and provides a formula IV compound preparation method which is simple, economical, environmentally-friendly and easy to produce industrially; the reaction solvent of the method is easily recycled and the method can produce the formula IV compound at high production rates and with high purity.
본 발명은 4-벤질-1-펜에틸-피페라진-2,6-디온(화학식 IV의 화합물)의 새로운 핵심 중간체(화학식 III의 화합물), 그의 약학적으로 허용 가능한 염 및 그의 제조방법을 제공한다. 본 발명은 추가로 하기 화학식 III의 화합물로부터 4-벤질-1-펜에틸-피페라진-2,6-디온(화학식 IV의 화합물)을 제조하는 방법을 개시하며, 상기 방법은 상기 화학식 IV의 화합물의 현행 제조방법의 단점들, 예를 들어 낮은 생산량, 낮은 순도, 높은 에너지 소비, 고비용, 및 산업적 생산을 달성할 수 없는 점을 극복하며, 간단하고 경제적이며 환경-친화적이고 산업적으로 생산하기 용이한 상기 화학식 IV의 화합물의 제조방법을 제공하고; 상기 방법의 반응 용매는 쉽게 재생되며, 상기 방법은 상기 화학식 IV의 화합물을 높은 수율 및 높은 순도로 생성할 수 있다. [화학식 III] [화학식 IV]
[EN] 4-BENZYL-1-PHENETHYL-PIPERAZINE-2,6-DIONE PREPARATION METHOD, AND INTERMEDIATE AND PREPARATION METHOD THEREOF<br/>[FR] PROCÉDÉ DE PRÉPARATION DE 4-BENZYL-1-PHENÉTHYL-PIPÉRAZINE-2,6-DIONE, ET INTERMÉDIAIRE ET PROCÉDÉ DE PRÉPARATION DE CE DERNIER
Synthesis and anthelmintic activity of a series of of pyrazino[2,1-a][2]benzazepine derivatives
作者:Malcolm D. Brewer、Malcolm N. Burgess、Roderick J. J. Dorgan、Richard L. Elliott、Patrick Mamalis、Brian R. Manger、Richard A. B. Webster
DOI:10.1021/jm00129a007
日期:1989.9
A series of 1,2,3,4,6,7,8,12b-octahydropyrazino[2,1-alpha][2] benzazepine derivatives was prepared and the cestocidal activity of the compounds evaluated in an in vitro Taenia crassiceps screen. Many of these derivatives proved to be highly active, and 2-(cyclohexylcarbonyl)-4-oxo-1,2,3,4,6,7,8,12b- octahydropyrazino[2,1-alpha][2]benzazepine, epsiprantel (BAN) (22), was selected for further development. The structure-activity relationships are discussed.