Synthesis and Evaluation of 7<i>H</i>-8,9-Dihydropyrano[2,3-<i>c</i>]imidazo[1,2-<i>a</i>]pyridines as Potassium-Competitive Acid Blockers
作者:Andreas M. Palmer、Burkhard Grobbel、Cornelia Jecke、Christof Brehm、Peter J. Zimmermann、Wilm Buhr、Martin P. Feth、Wolfgang-Alexander Simon、Wolfgang Kromer
DOI:10.1021/jm7010063
日期:2007.11.1
potassium-competitive acid blockers (P-CABs). The title compounds were prepared following synthetic pathways that relied either on a Claisen rearrangement/cross-metathesis reaction or on the (asymmetric) reduction of prochiral ketones. The influence of the character of the substituents R3, R6, and Ar on the biological activity and the physicochemical properties of the target compounds was examined. In contrast
鉴定出具有优异的理化和药理特性的7H-8,9-二氢吡喃并[2,3-c]咪唑并[1,2-a]吡啶,它们可作为钾竞争性酸阻滞剂(P-CABs)的进一步开发。按照合成途径制备标题化合物,所述合成途径依赖于克莱森重排/交叉复分解反应或前手性酮的(不对称)还原。研究了取代基R3,R6和Ar的特性对目标化合物的生物学活性和理化性质的影响。与母体系统(R6 = H)相反,其中R6代表羧酰胺残基的化合物通常显示出更高的体内活性和有利的pKa / log D值。尽管R3的变化可用于获得具有改良的碱性和亲脂性的目标化合物,但仅对于R3 =甲基,观察到了对H + / K + -ATPase的强抑制作用和有效的体内活性。允许对芳基进行小的修饰,例如氢取代氟原子或甲基。(9S)-对映异构体负责胃酸分泌抑制作用,而(9R)-对映异构体实际上是无活性的。