Zn powder is found to catalyze the Friedel-Crafts acylation of aromatic compounds with acyl halides efficiently under microwave irradiation in solvent-free conditions. Activated substrates undergo acylation predominantly at the para-position. The Zn powder can be re-used up to six times after simple washing with diethyl ether and dilute HCl.
锌粉被发现能在无溶剂条件下,通过微波辐射高效催化芳香化合物与酰
氯的傅-克酰基化反应。活化后的底物主要在邻位进行酰基化。经过用
乙醚和稀
盐酸简单洗涤后,
锌粉可被重复使用多达六次。