Guanidine Derivatives as Combined Thromboxane A<sub>2</sub> Receptor Antagonists and Synthase Inhibitors
作者:Rainer Soyka、Brian D. Guth、Hans M. Weisenberger、Peter Luger、Thomas H. Müller
DOI:10.1021/jm9707941
日期:1999.4.1
A new series of omega-disubstituted alkenoic acid derivatives derived from samixogrel 5 were designed and synthesized as combined thromboxaneA2receptorantagonists/thromboxaneA2 synthase inhibitors with improved solubility and reduced protein binding compared to 5. Hexenoic acid derivatives with a 3-pyridyl group and 3-(2-cyano-3-alkyl-guanidino)phenyl substituent were found to be optimal with regard
α1-Adrenoceptor Blocking Activity of Some Ring-open Analogues of Prazosin
作者:Donatella Boschi、Antonella Di Stilo、Roberta Fruttero、Claudio Medana、Giovanni Sorba、Alberto Gasco
DOI:10.1002/ardp.19943271012
日期:——
Synthesis and structural characterization of some ring‐open analogues of Prazosin containing either the guanidine substructure or urea‐equivalent groups are described. The opening of the pyrimidine ring in Prazosin is very important as far as the affinity for α1‐adrenoceptor is concerned. The pA2 values of the ring‐open derivatives are 104–105 fold lower than that of the parent. It is probable that
Synthese positiv inotroper Substanzen: Imidazolylpropylguanidine mit Pyridin-Partialstruktur
作者:Armin Buschauer
DOI:10.1002/ardp.19883210709
日期:——
Durch zweifache Aminolyse von N‐Benzoyl‐diphenylimidocarbonat und anschließende saure Hydrolyse wurden unsymmetrisch substituierte Imidazolylpropylguanidine hergestellt. Die Substanzen wirken am H2‐Rezeptor des Atriums und am Papillarmuskel des Meerschweinchens bis zu 20mal stärker agonistisch als Histamin.
Durch zweifache Aminolyse von N-Benzoyl-diphenylimidocarbonat und anschließende saure Hydrolyse wurden unsymmetrisch substituierte Imidazolylpropylguanidine hergestellt。Die Substanzen wirken am H2-Rezeptor des Atriums und am Papilmuskel des Meerschweinchens bis zu 20mal stärker agonistisch als Histamin。
Synthesis and Histamine H2-Receptor Antagonist Activity of 4-(1-Pyrazolyl)butanamides, Guanidinopyrazoles, and Related Compounds
作者:Armin Buschauer、Rainer Mohr、Walter Schunack
DOI:10.1002/ardp.19953280411
日期:——
amide (9a) proved to be the compound with the highest H2‐receptor antagonist activity of 23 compounds tested at the isolated guinea pig right atrium preparation, achieving about 6 times famotidine's or 160 times cimetidine's potency. By contrast, in Ghosh‐Schild rats 9a did not inhibit histamine‐stimulated gastric acid secretion at a dosage of 0.1 μmol/kg i.v. Compounds 20a (the 3‐(trifluoroethylguanidino)pyrazole
通过4-(3-硝基)丁酰胺、吡唑烷基氰基胍和吡唑环的3-位具有不同官能团(如硝基、氨基、胍基)的一系列4-(1-吡唑基)丁酰胺、吡唑基烷基氰基胍和相关化合物。 1-吡唑基)丁腈(5)和相应的羧酸7作为中心中间体。酰胺 9a - d 由伯胺 8a - d 制备,它们代表 H2 受体拮抗剂罗沙替丁、西咪替丁、雷尼替丁和法莫替丁的部分结构。罗沙替丁衍生的4-(3-硝基-1-吡唑基)丁酰胺(9a)被证明是在离体豚鼠右心房制剂中测试的23种化合物中H2-受体拮抗剂活性最高的化合物,达到法莫替丁的约6倍或西咪替丁效力的 160 倍。相比之下,其在心房中的活性与法莫替丁差不多,结果证明它也是非常有效的胃酸分泌抑制剂(例如,29:在 0.025 μmol/kg 时抑制率为 74%)。这些化合物在大鼠胃中与法莫替丁相当,在该测试系统中远远优于西咪替丁和雷尼替丁。其在心房中的活性与法莫替丁差不多,结果证明它也
Synthesis and in vitro pharmacology of arpromidine and related phenyl(pyridylalkyl)guanidines, a potential new class of positive inotropic drugs
作者:Armin Buschauer
DOI:10.1021/jm00128a045
日期:1989.8
-yl)propyl]-N2-[2-[[(5-methyl-1H-imidazol-4- yl)methyl]thio]ethyl]guanidine) by more lipophilic H2-nonspecific pheniramine-like structures resulted in potent H2 agonists with up to 160 times the activity of histamine in the isolated, spontaneously beating guineapig right atrium. Additionally, the compounds proved to be moderate H1 antagonists. Highest H2-agonistic potency was found in compounds characterized