Synthesis and structure-activity relationships of 9-substituted acridines as endothelin-A receptor antagonists
摘要:
Screening of a compound library against endothelin receptors (ET(A) and ET(B)) revealed PD 102566 (compound 1) as an ET(A) selective antagonist. Synthesis,and structure-activity relationships (SAR) of a series of analogs are described. Copyright (C) 1996 Elsevier Science Ltd
Rhenium-Catalyzed Addition of β-Enamino Esters to Allenes
作者:Yoichiro Kuninobu、Kazuhiko Takai、Atsuhiro Yamashita、Shun-ichi Yamamoto、Salprima Yudha S.
DOI:10.1055/s-0029-1218281
日期:2009.11
Treatment of β-enamino esters with terminal allenes in the presence of a catalytic amount of a rhenium complex, [ReBr(CO)3(thf)]2, gave α-alkenylated β-imino or β-enamino esters. In this reaction, a new carbon-carbon bond is formed between the active methylene moiety of the β-enamino esters and the β-carbon of the terminal allenes.
Zn(ClO 4 ) 2 .6H 2 O proved to be a very powerfulcatalyst for the condensation of primary and secondary amines with β-ketoesters to give N-substituted β-enaminoesters.
Regio- and stereoselective double alkylation of β-enamino esters with organolithium reagents followed by one-pot reduction: convenient method for the synthesis of tertiary γ-amino alcohols
stereoselective procedure for the preparation of tertiary γ-amino alcohols starting from β-enamino esters is presented. In this procedure, the double alkylation of β-enamino esters with organolithium reagents is followed by one-pot reduction with sodium borohydride in methanol/acetic acid. A hypothesis of mechanism is given, explaining the observed diastereoselectivity through molecular modeling. The configuration
提出了一种简单,高产且立体选择性的方法,该方法可从β-烯胺酯开始制备叔γ-氨基醇。在该方法中,用有机锂试剂对β-烯胺酯进行双烷基化,然后用硼氢化钠在甲醇/乙酸中一锅还原。给出了机理的假设,通过分子建模解释了观察到的非对映选择性。产物的构型通过1 H NMR光谱结合构象分析确定。
Mechanism of Hydrolysis and Structure–Stability Relationship of Enaminones as Potential Prodrugs of Model Primary Amines
作者:Vijay H. Naringrekar、Valentino J. Stella
DOI:10.1002/jps.2600790213
日期:1990.2
compound, suggesting that the rate-controlling step in the hydrolysis of the enaminones was the proton addition to the vinyl carbon of the enaminone. Enaminones formed with cyclic 1,3-dicarbonyl compounds were significantly more stable than those formed with structurally similar acyclic compounds. Based on chemical stability considerations alone, enaminones do not appear to be good candidates as prodrugs of
Ca(CF3COO)2: An efficient Lewis acid catalyst for chemo- and regio-selective enamination of β-dicarbonyl compounds
作者:Mohamed Anoir Harrad、Rachid Outtouch、Mustapha Ait Ali、Larbi El Firdoussi、Abdallah Karim、Alain Roucoux
DOI:10.1016/j.catcom.2009.11.019
日期:2010.1
A relevant procedure has been developed for the synthesis of β-enaminoesters catalysed by Ca(CF3COO)2. The reaction of β-ketoesters with primary amines was efficiently carried out under solvent-free conditions at room temperature and led to chemo- and regio-selective formations of enamine derivatives in high yields.