论文部分内容阅读
格氏试剂是有机和金属有机合成中一类重要反应中间体,但是某些卤化物很难与商品镁粉进行格氏反应,例如,芳基氯化物、乙烯基氯化物、烷基氟化物等。近年来,先后出现了一些制备活性镁的方法。Rieke 等于四氢呋喃中在碘化钾存在下,用金属钾还原无水氯化镁制得活性镁:Bogdanovic 等用催化加氢制备的活性氢化镁热分解,得到活性镁;我们曾用蒽镁真空热分解制得活性镁。这类
Grignard reagents are a kind of important reaction intermediates in organic and metal organic synthesis. However, some of the halides are difficult to carry out Grignard reaction with commercial magnesium powder, for example, aryl chlorides, vinyl chlorides, alkyl fluorides and the like . In recent years, there have been some methods of preparing active magnesium. Rieke is equal to tetrahydrofuran in potassium iodide in the presence of potassium chloride to restore anhydrous magnesium chloride to obtain active magnesium: Bogdanovic and other hydrogenation using catalytic hydrogenation of active magnesium hydride thermal decomposition, to obtain active magnesium; we have anthraquinone vacuum thermal decomposition obtained activity magnesium. This class