synthesized, following Claisen-Schmidt condensation of (hetero)aryl ketones and (hetero)aryl aldehydes using a ultrasound probe. A comparison was made with classical magnetic stirring experiments, and an optimization study was realized, showing lithium hydroxide to be the best basic catalyst of the studied condensations. By-products of the reactions (β-hydroxy-ketone, diketones, and cyclohexanols) were also
Abstract Thirty semicarbazone and thiosemicarbazone derivatives (2a–w and 4a–g) from chalcones containing furan and thiophene ring were designed and synthesized. They were characterized by IR, 1H NMR, 13C NMR and HRMS. The crystal structure of compound 2r was characterized by single crystal X-ray diffraction. It crystallizes in the monoclinic system with space group P21/c. The insecticidal activity
摘要 设计并合成了来自含有呋喃和噻吩环的查耳酮的30 种缩氨基脲和缩氨基硫脲衍生物(2a - w和4a - g)。它们通过 IR、1 H NMR、13 C NMR 和 HRMS进行表征。化合物2r的晶体结构通过单晶X射线衍射表征。它在空间群为P 2 1 / c的单斜晶系中结晶。合成的化合物对白斑病和菜青虫的杀虫活性进行了筛选使用β-氯氰菊酯作为比较标准。结果表明,它们中的大多数具有显着的杀虫活性。其中,化合物2e-g对L表现出比 β-氯氰菊酯更好的活性。分离和P。油菜。化合物2p还具有比 β-氯氰菊酯更好的抗P活性。油菜。这些化合物的杀虫活性是首次报道。