Structure-affinity relationships of berbines or 5,6,13,13a-tetrahydro-8H-dibenzo[a,g]quinolizines at α-adrenoceptors
摘要:
The synthesis of some derivatives of tetrahydro-8H-dibenzo[a,g]quinolizines or berbines is described. A pharmacological study was carried out at alpha-1 and alpha-2-adrenoceptors using radioligand binding techniques. This study has shown that the aromatic ring A is responsible for the alpha-2-affinity of berbines. Furthermore, the aromatic ring D is important for alpha-1-affinity. However, in this case, it seems that the planarity of the molecule is a very important structural parameter for affinity. The role of the nitrogen atom is also discussed. A conformational analysis of the partial saturated berbines was established by a C-13 NMR study.
Pyridinium-containing polyheterocycles exhibit distinctive biological properties, interesting electrochemical and opticalproperties, and thus are widely used as drugs, functional materials, and photocatalysts. Here, we describe a unified two-step strategy by merging Rh-catalyzed C-H vinylation with two switchable electrocyclizations, including aza-6π- and all-carbon 6π-electrocyclizations, for rapid
[EN] CORALYNE ANALOGS AS TOPOISOMERASE INHIBITORS<br/>[FR] ANALOGUES DE CORALYNE UTILES EN TANT QU'INHIBITEURS DE TOPOISOMERASE
申请人:RUTGERS, THE STATE UNIVERSITY OF NEW JERSEY
公开号:WO1997029106A1
公开(公告)日:1997-08-14
(EN) The present invention provides protoberberine alkaloid derivatives useful as anticancer agents, and methods of use thereof. The invention also provides protoberberine derivatives useful as topoisomerase inhibitors. The invention further provides coralyne and nitidine derivatives which are topoisomerase I-targeted therapeutics effective against camptothecin resistant cancer cells, and are especially effective against CNS tumors.(FR) L'invention concerne des dérivés d'alcaloïde de protoberbérine utiles en tant qu'agents anti-cancer, ainsi que leurs procédés d'utilisation. Elle concerne également des dérivés de protoberbérine utiles en tant qu'inhibiteurs de topoisomérase. Elle concerne encore des dérivés de coralyne et de nitidine qui sont des agents thérapeutiques dirigés contre la topoisomérase I et efficaces contre les cellules cancéreuses résistant à la camptothécine, ainsi que, particulièrement, contre les tumeurs du système nerveux central.