Efficient preparation of 3-substituted quinazolinediones directly from anthranilic acids and isocyanates
作者:Natalie Koay、Louis-Charles Campeau
DOI:10.1002/jhet.551
日期:2011.3
An efficient and practical synthesis of 3‐substituted quinazolinediones is described. The protocol uses readily available isocyanates and anthranilic acids as precursors in a one‐pot operation and has been demonstrated on >50 g scale. Isolation of the products via filtration directly from the reaction media is facile, affording high‐purity material. This procedure was then applied to the synthesis
描述了一种高效,实用的3-取代喹唑啉二酮的合成方法。该协议在一口操作中使用了现成的异氰酸酯和邻氨基苯甲酸作为前体,并已证明> 50 g规模。通过过滤直接从反应介质中分离产物很容易,从而提供了高纯度的物质。然后将该程序应用于Zenarestat的合成。J.杂环化学。(2011)。