Novel milrinone analogs of pyridine-3-carbonitrile derivatives as promising cardiotonic agents
摘要:
In an attempt to design new inotropic drugs for congestive heart failure (CHF) with less proarrhythmic potential, three series of compounds analogous to mirlinone were prepared, namely, 4-aryl-6-(4-pyridyl)-2-oxo-1,2-dihydropyridine-3-carbonitriles 2a-g, 4-aryl-6-(4-pyridyl)-2thioxo-1,2-dihydropyridine-3-carbonitriles 3a-g and 2-amino-4-aryl-6-(4-pyridyl)-pyridine-3-carbonitriles 4a-g. The first series was prepared by reacting 4-acetyl pyridine with the appropriate aldehyde, ethyl cyanoacetate and ammonium acetate in ethanol. Reaction of 2a-g with phosphorus pentasulfide afforded the second series 3a-g. The third target compounds 4a-g were prepared applying the same procedure used to synthesize 2a-g using malononitrile instead of ethyl cyanoacetate. All the newly synthesized compounds were evaluated for their cardiotonic activity and their in vivo cardiovascular effects. In addition, their oral and parentral acute toxicity were determined. Compounds 2a, 2b, 2c, 4c and 4f proved to exert cardiotonic activity comparable to that of milfinone using spontaneously beating atria model from reserpine-treated guinea pigs. In addition these compounds proved to be non-toxic and well tolerated by mice up to 250 mg kg(-1) orally and up to 125 mg kg(-1) through parenteral route. (c) 2005 Elsevier SAS. All rights reserved.
Fe3O4@SiO2@(CH2)3-urea-thiourea: A novel hydrogen-bonding and reusable catalyst for the construction of bipyridine-5-carbonitriles via a cooperative vinylogous anomeric based oxidation
作者:Fatemeh Karimi、Meysam Yarie、Mohammad Ali Zolfigol
DOI:10.1016/j.mcat.2020.111201
日期:2020.12
elemental mapping analysis. The catalytic performance of the novel hydrogen-bonding catalyst was appropriately probed through the multicomponent preparation of bipyridine-5-carbonitriles via a cooperative vinylogous anomeric based oxidation (CVABO) mechanism in the absence of any solvent. The novel hydrogen-bonding nanomagneticcatalyst can readily be regained and reused four times without appreciable
Novel milrinone analogs of pyridine-3-carbonitrile derivatives as promising cardiotonic agents
作者:Adnan A. Bekhit、Azza M. Baraka
DOI:10.1016/j.ejmech.2005.06.005
日期:2005.12
In an attempt to design new inotropic drugs for congestive heart failure (CHF) with less proarrhythmic potential, three series of compounds analogous to mirlinone were prepared, namely, 4-aryl-6-(4-pyridyl)-2-oxo-1,2-dihydropyridine-3-carbonitriles 2a-g, 4-aryl-6-(4-pyridyl)-2thioxo-1,2-dihydropyridine-3-carbonitriles 3a-g and 2-amino-4-aryl-6-(4-pyridyl)-pyridine-3-carbonitriles 4a-g. The first series was prepared by reacting 4-acetyl pyridine with the appropriate aldehyde, ethyl cyanoacetate and ammonium acetate in ethanol. Reaction of 2a-g with phosphorus pentasulfide afforded the second series 3a-g. The third target compounds 4a-g were prepared applying the same procedure used to synthesize 2a-g using malononitrile instead of ethyl cyanoacetate. All the newly synthesized compounds were evaluated for their cardiotonic activity and their in vivo cardiovascular effects. In addition, their oral and parentral acute toxicity were determined. Compounds 2a, 2b, 2c, 4c and 4f proved to exert cardiotonic activity comparable to that of milfinone using spontaneously beating atria model from reserpine-treated guinea pigs. In addition these compounds proved to be non-toxic and well tolerated by mice up to 250 mg kg(-1) orally and up to 125 mg kg(-1) through parenteral route. (c) 2005 Elsevier SAS. All rights reserved.