Allylation of Ketones with Methyl 3-(Bromomethyl)but-3-enoate. Synthesis of Bioactive Unsaturated Lactones Based on Benzo[f]coumarin and Its Derivatives
作者:Yu. P. Lamekina、T. A. Kulahava、V. A. Shumski、I. V. Mineyeva
DOI:10.1134/s1070428022060021
日期:2022.6
developed for the allylation of structurally diverse ketones with methyl 3-(bromomethyl)but-3-enoates, and the possibility of using the allylation products in the target-oriented synthesis of new heterocyclic compounds has been demonstrated. Modification of benzo[f]coumarinderivatives at the keto group via Barbier allylation with methyl 3-(bromomethyl)but-3-enoate has been performed for the first time with
摘要 已经开发出有效的方法来用 3-(溴甲基)丁-3-烯酸甲酯对结构多样的酮进行烯丙基化,并且已经证明了在新杂环化合物的靶向合成中使用烯丙基化产物的可能性。首次使用 3-(溴甲基)丁-3-烯酸甲酯通过 Barbier 烯丙基化对酮基上的苯并[ f ]香豆素衍生物进行修饰,目标是随后形成内酯片段。合成的苯并[ f ]香豆素衍生物已通过光谱方法表征,并估计了它们穿透磷脂双层的能力。已发现这些化合物既不影响 C6 大鼠神经胶质瘤细胞的活力也不影响增殖。得到的苯并[ f]香豆素衍生物在基于过氧化氢和次氯酸钠的模型系统中表现出抗氧化特性。
Substituent Effects in the Solvolysis of<i>p</i>-(2-Substituted Cyclopropyl)-α-Methylbenzyl Chlorides
The solvolysis rates of p-(cis- or trans-2-substituted cyclopropyl)-α-methylbenzyl chlorides including electron-donating and electron-attracting substituents relative to a hydrogen substituent were measured in 80% aqueous acetone. The trans isomers were more reactive than the corresponding cis derivatives where cyclopropyl and phenyl groups could not get a most favorable “bisected” conformation for