A synthetic approach to 2,3,4-substituted pyridines useful as scaffolds for tripeptidomimetics
作者:Stina Saitton、Jan Kihlberg、Kristina Luthman
DOI:10.1016/j.tet.2004.05.048
日期:2004.7
of amino acid derivatives in the 4-position of the pyridine was found to proceed efficiently by conversion of iodo-pyridine to a Grignard derivative, which was allowed to react with a protected amino aldehyde. Substitution of fluorine in the 2-position of the pyridine was found to be facile with alkoxide nucleophiles, whereas amines were much less reactive.
描述了在肽模拟物开发中用作支架的2,3,4-取代的吡啶衍生物的合成。已经探索了在卤素舞反应中使用各种亲电试剂来生产3-烷基-2-氟-4-碘吡啶吡啶衍生物作为“功能化支架”的可能性,并探讨了区分两种卤素手柄的反应性的可能性。 。发现通过将碘吡啶转化为格利雅衍生物,可以使吡啶的4-位上的氨基酸衍生物有效地偶联,使其与受保护的氨基醛反应。发现吡啶的2-位上的氟取代容易与醇盐亲核试剂反应,而胺的反应性要低得多。