Benzoxazoles, benzothiazoles and benzimidazoles having substituents on the azole and benzene nuclei were synthesized evaluated for antifungal, insecticidal and herbicidal activities. It was found that benzimidazoles tended to exhibit antifungal activity while benzothiazoles tended to show herbicidal activity. Chloro, trifluoromethyl, methoxy and ethoxy groups at the 5 position were potent substituents, and the 2-pyridyl group at the 2 position is a common structural unit. Among several active derivatives, 7-chloro-2-(2-pyridyl) benzimidazole and 2-(2-pyridyl)-5-trifluoromethylbenzothiazole exhibited significant activity against Panonycus citri.
A series of N1-(substituted phenyl) pyridinecarboxamidines was synthesized by the condensation of substituted anilines with cyanopyridines in the presence of aluminum chloride or sodium amide and these compounds were evaluated for antiinflammatory activity by the carrageenin-induced rat paw edema assay. In the synthesis of N1-alkoxyphenyl pyridinecarboxamidines, it was found that o-alkoxyanilines reacted with aluminum chloride to afford o-aminophenol, while m- and p-alkoxyanilines were scarcely dealkylated. Sodium amide was successfully used for the condensation of o-alkoxyanilines with cyanopyridines. Among several active derivatives, N1-(2, 4-dichlorophenyl) pyridinecarboxamidine and N1-(4-chlorophenyl)-pyridinecarboxamidine exhibited significant antiinflammatory activities.
We have developed a visible light-induced photo-redox copper-catalyzed oxidative Csp2–H annulation (Friedel–Crafts-type cyclization) of amidines with terminalalkynes at room temperature to synthesize functionalized quinazolines. We report copper(I)-phenylacetylide catalyzed photo-oxidative Csp2–H annulation of amidines at RT, which is very challenging and complementary to the conventional transition
我们开发了一种可见光诱导的光氧化还原铜催化氧化 C sp 2 -H 环化(Friedel-Crafts 型环化)与末端炔烃在室温下合成功能化喹唑啉。我们报告了铜(I)-苯乙炔在室温下催化的脒的光氧化 C sp 2 -H 环化,这是非常具有挑战性的,并且与传统的过渡金属催化的热环化反应互补。我们已经通过合成抗癌化合物证明了这种方法的应用。此外,绿色化学指标(E-factor 比报道的热方法好 1.9 倍)和 Eco-Scale(尺度 55.4,显示可接受的合成)评估表明该方法是生态友好和环境可行的。