efficient one-pot reaction for the synthesis of oxoaporphine alkaloids has been developed. Twenty-three compounds of oxoaporphine alkaloids were prepared and assessed for their antitumor activities. Most compounds inhibited the growth of T-24 tumor cells in vitro. Particularly, 4B displayed the most potent activity with an IC50 value of 0.5 μM, which was 19-fold more potent than the parent compound 4. The
已经开发了一种用于合成氧代卟啉生物碱的有效一锅法反应。制备并评估了 23 种氧代卟啉生物碱化合物的抗肿瘤活性。大多数化合物在体外抑制 T-24 肿瘤细胞的生长。特别是,4B显示出最有效的活性,其 IC 50值为 0.5 μM,比母体化合物4强 19 倍。-NO 2在氧代卟啉核心的C3位取代显着增强了抗癌活性。机制研究表明,4和4B诱导细胞周期停滞在G2/M期;相比之下,4V诱导细胞周期停滞在 S 期。T-24细胞暴露于化合物4、4B和4V后观察到线粒体ROS/Ca 2+增加和MMP减少,并伴有caspase-3/9活化,提示线粒体途径参与诱导的细胞凋亡。此外,化合物4B在带有 T-24 的小鼠异种移植模型中有效抑制肿瘤生长。
Direct Conversion of 1-(2-Bromobenzoyl)isoquinolines to Dibenzo[<i>de,g</i>]quinolin-7-ones via Reductive Photocyclization
from the corresponding isoquinolinones and (2-bromophenyl)acetonitriles in four steps. This represents a convenientapproach toward the synthesis of tetracyclic alkaloids. A direct conversion of 1-(2-bromobenzoyl)isoquinolines to dibenzo[de,g]quinolin-7-ones is the key step in the total synthesis. The yield of the reductive photocyclization depends on the position of the substituents at the isoquinolyl