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