<i>N</i>-(Alkyl)-2-amino-1,4-pyrazine Derivatives: Synthesis and Antioxidative Properties of 3- and 3,5-<i>p</i>-Hydroxyphenyl-Substituted Compounds
作者:Jacqueline Marchand-Brynaert、Paul Jeanjot、Frédéric Bruyneel、Axelle Arrault、Sonia Gharbi、Jean-François Cavalier、Agnès Abels、Cécile Marchand、Roland Touillaux、Jean-François Rees
DOI:10.1055/s-2003-37652
日期:——
development in medicinal chemistry, the lipophilicity of these lead compounds has to be increased. Therefore various methods of N-alkylation were systematically explored. The best results were obtained by quenching aminopyrazinyl anion with alkyl iodides, and by coupling aldehydes (reductive amination) in the presence of phenylsilane and tin catalyst. Aminopyrazines equipped with linear alkyl side-chains of
2-氨基-5-(对羟基苯基)-1,4-吡嗪和2-氨基-3,5-双(对羟基苯基)-1,4-吡嗪具有优异的抗氧化性能。为了药物化学的可能发展,必须提高这些先导化合物的亲脂性。因此,系统地探索了各种 N-烷基化方法。最好的结果是用烷基碘猝灭氨基吡嗪阴离子,并在苯基硅烷和锡催化剂存在下偶联醛(还原胺化)。配备至少六个碳的直链烷基侧链的氨基吡嗪在脂质介质中显示出改善的自由基清除性能。