Zeolite-catalyzed acylation of heterocyclic compounds — VI. One-step synthesis of 3-(benzofuran-2-carbonyl)pentane-2,4-dione from 2-acetylbenzofuran over HY-zeolite
作者:F. Richard、H. Carreyre、J.M. Coustard、C. Bachmann、G. Perot
DOI:10.1016/s0040-4020(98)00904-1
日期:1998.12
The reaction between 2-acetylbenzofuran and acetic anhydride at 60°C in the presence of HY-zeolite () led to a single final product: 3-(benzofuran-2-carbonyl)pentane-2,4-dione resulting from two consecutive acylation steps on the side chain. It was obtained in a 90% purity at around 50% conversion of 2-acetylbenzofuran. Other minor products and intermediates were also identified. A mechanism is proposed
2-乙酰基苯并呋喃与乙酸酐在60°C下在HY沸石()存在下反应生成单个最终产物:由两次连续的酰化反应生成的3-(苯并呋喃-2-羰基)戊烷-2,4-二酮在侧链上的脚步。以2-乙酰基苯并呋喃的约50%的转化率以90%的纯度获得了它。还确定了其他次要产品和中间体。提出了一种机制来解释各种产品的形成。