Synthesis of Peptide Nucleic Acids Containing Pyridazine Derivatives As Cytosine and Thymine Analogs, and Their Duplexes with Complementary Oligodeoxynucleotides
Synthesis of peptide nucleic acids (PNAs) is reported with new pyridazine-type nucleobases: 3-aminopyridazine (aPz) and 1-aminophthalazine (aPh) as cytosine analogs, and pyridazin-3-one (PzO) and phthalazin-1-one (PhO) as thymine analogs. The PNAs having an aPz or a PzO formed duplexes with each complementary oligodeoxynucleotide forming a base pair with G or A, respectively, as evaluated by using
Synthesis and structure-activity relationship study of novel 3-heteroarylcoumarins based on pyridazine scaffold as selective MAO-B inhibitors
作者:María Carmen Costas-Lago、Pedro Besada、Fernanda Rodríguez-Enríquez、Dolores Viña、Santiago Vilar、Eugenio Uriarte、Fernanda Borges、Carmen Terán
DOI:10.1016/j.ejmech.2017.07.045
日期:2017.10
Compounds of hybrid structure pyridazine-coumarin were discovered as potent, selective and reversible inhibitors of monoamine oxidase B (MAO-B). These compounds were synthesized in good yield following a multistep approach based on Knoevenagel reaction and using as key intermediate pyridazinone 16, which was obtained from maleic anhydride and furan. Compounds 9b and 9d are the most active compounds
for the discovery of reversible and selectiveinhibitors of MAO-B, a validated drug target for PD therapy which also plays an important role in the AD progress. Looking for its structural optimization, novel compounds of hybrid structure coumarin-pyridazine, differing in polarizability and lipophilicity properties, were synthesized and tested against the two MAO isoforms, MAO-A and MAO-B (compounds