Synthesis and biological evaluation of novel N, N′-disubstituted urea and thiourea derivatives as potential anti-melanoma agents
摘要:
Two series of urea and thiourea derivatives (1a-11a, 1b-11b) have been synthesized; all the 22 compounds were reported for the first time. Their anti-proliferative activities against the melanoma cell line B16-F10 were evaluated. Among the compounds tested, compound 6b exhibited the most potent activity in melanoma cells growth inhibition (IC50 = 0.33 mu M). The bioassay tests showed that anti-proliferative activities of these novel compounds were possibly caused by inhibition of ERK1/2 phosphorylation level. Therefore, compound 6b can be a potential anti-melanoma agent and an inhibitor of ERK1/2 phosphorylation deserving further research.
Two series of urea and thiourea derivatives (1a-11a, 1b-11b) have been synthesized; all the 22 compounds were reported for the first time. Their anti-proliferative activities against the melanoma cell line B16-F10 were evaluated. Among the compounds tested, compound 6b exhibited the most potent activity in melanoma cells growth inhibition (IC50 = 0.33 mu M). The bioassay tests showed that anti-proliferative activities of these novel compounds were possibly caused by inhibition of ERK1/2 phosphorylation level. Therefore, compound 6b can be a potential anti-melanoma agent and an inhibitor of ERK1/2 phosphorylation deserving further research.
Redox-Neutral Intramolecular Dearomative Spirocyclization of Phenols Induced by Visible Light
spirocyclohexadienone. Mechanistic experiments revealed that the arylhalide was reduced to aryl radical via the single-electron transfer (SET) process under visible light irradiation. The electrophilic addition of an aryl radical with the phenolate anion moiety gave a radical anion intermediate, which recycled the photocatalyst by a second SET process.
本文描述的是由可见光诱导的氧化还原中性分子内脱芳环化。光化学环化由酚盐阴离子衍生的光催化剂催化,并产生螺环己二烯酮。机理实验表明,芳基卤化物在可见光照射下通过单电子转移 (SET) 过程还原为芳基自由基。芳基与酚盐阴离子部分的亲电加成产生自由基阴离子中间体,通过第二个 SET 过程回收光催化剂。