A range of 2-aryl and 2-alkyl quinazolinones have been prepared in moderate to good yields from the reaction of anthranilic acid and the appropriately substituted imidate in a facile, mild, one-pot procedure. Subsequent reaction with phosphorus oxychloride afforded the corresponding 4-chloro-2-substituted quinazolines, which are useful synthetic intermediates, in good to high yields. Product isolation was facilitated by the development of work up procedures for both reactions that did not include purification by column chromatography.
通过简单、温和的一锅式反应,我们从
蚁酸和适当取代的
亚胺酯反应中制备出了一系列 2-芳基和 2-烷基
喹唑啉酮,收率从中等到良好。随后与氧
氯化
磷反应,可以得到相应的 4-
氯-2-取代
喹唑啉类化合物,它们是有用的合成中间体,收率从好到高。为这两个反应开发的工作程序不包括柱层析纯化,从而促进了产品的分离。