四氢萘与香豆素反应研究——Ⅰ. 供氢溶剂下香豆素和氢化香豆素反应行为研究

本实验证明了: (1)香豆素和四氢萘反应生成氢化香豆素; 2)氢化香豆素是一种比较稳定的产物, 但在一定条件下可以进一步反应生成其它产物。文中给出了应用多种方法对中间物及产物的分析结果。动力学实验及产物分析结果表明氢化香豆素的大多数反应步骤是按连串反应进行。本文提出的反应机理较好地解释了实验现象。

STUDIES ON THE REACTION BETWEEN TETRALIN AND COUMARIN Ⅰ.THE REACTION OF COUMARIN AND DIHYDROCOUMARIN IN HYDROGEN DONATOR SOLVENT

It has been proved in our experiments that (1) Dihydrocoumarin can be formed from the reaction between coumarin and tetralin; (2) Dihydrocoumarin is rather stable, but it is able to react producting other products on certain conditions. The results of analyses of the intermediates and products of reactions using chromatograph-mass spectrum, nuclear magnetic resonance and infra-red spectrograph are given. A proof that most of the steps for the reaction of Dihydrocoumarin are consecutive has been given from kinetic experiments and analytical results of the products. A mechanism for the reaction has been suggested which can reasonably explain all the experimental results.