Stable C–N axial chirality in 1-aryluracil scaffold and differences in in vitro metabolic clearance between atropisomers of PDE4 inhibitor
作者:Futoshi Hasegawa、Kazushi Kawamura、Hiroshi Tsuchikawa、Michio Murata
DOI:10.1016/j.bmc.2017.06.042
日期:2017.8
of the N(1)-phenyl group. Racemic 1-phenyl-6-aminouracils were first separated by chiral HPLC or converting them to the corresponding diastereomers using a chiral resolving agent. We then determined the rotational barrier of each atropisomer by a thermal racemization method and found that these compounds have rotational barriers similar to other C–N axially chiral biaryls. In addition, there was a
我们在此报告了在1-苯基-6-氨基尿嘧啶支架中稳定的C–N轴向手性,这是由于在N(1)-苯基的邻位存在各种官能团所致。首先通过手性HPLC分离外消旋的1-苯基-6-氨基尿嘧啶,或使用手性拆分剂将它们转化为相应的非对映异构体。然后,我们通过热消旋法确定了每个阻转异构体的旋转势垒,发现这些化合物的旋转势垒与其他C–N轴向手性联芳基相似。此外,N的原位取代基的旋转势垒与范德华半径之间存在良好的相关性(1)-苯基。为了探索手性1-苯基-6-氨基尿嘧啶支架作为药物先导的可能性,我们合成了两种阻转异构体作为磷酸二酯酶-4抑制剂10。阻转异构体显示出显着不同的代谢稳定性,而它们的PDE4抑制活性有些相似。这一发现证明了稳定的C–N键阻转异构体在手性药物开发中的潜在效用。