Product selectivity in the photoreaction of aryl sulfonates and mesylate of estrone derivatives in sustainable and micellar media: a steady-state investigation
作者:Matías I. Quindt、Gabriel F. Gola、Cristian R. Rodriguez、Javier A. Ramirez、Sergio M. Bonesi
DOI:10.1039/d2nj02989h
日期:——
17-norestrone) was obtained due to the nature of the surfactant, i.e., cationic, anionic, or neutral. Certainly, micelles provide confinement of sulfonic esters within the hydrophobic core, inhibiting the diffusion of the photogenerated radical species into the bulk solution. Because the photoreaction was studied in micellar solutions, the measurement of the binding constant Kb and the estimation of the location
成功地对一系列芳基磺酸盐和雌酮和 17-炔诺酮衍生物的甲磺酸盐在密闭和可持续胶束环境中的光化学反应进行了制备和机理研究,并在甲醇溶液中进行了光化学行为检查。由于表面活性剂的性质,获得了有利于形成作为主要光产物的邻位区域异构体而不是形成雌酮(或 17-炔诺酮)的显着选择性,即、阳离子、阴离子或中性。当然,胶束将磺酸酯限制在疏水核内,从而抑制光生自由基物质扩散到本体溶液中。因为光反应是在胶束溶液中研究的,所以结合常数K b的测量并且使用紫外-可见光、1D-NMR 和 2D-NMR 光谱研究成功地估计了胶束疏水核心内类固醇的位置。结合常数值和微分化学位移 (DCS) 分析显示了磺酸盐在疏水核内的溶解。此外,核 Overhauser 效应光谱 (NOESY) 实验清楚地证明了磺酸盐在胶束内的位置。同样,扩散有序光谱 (DOSY) 实验明确表明,类固醇和胶束表现得像一个独特的超分子实体。