The present invention relates to benzoxazinone compounds having a yellow index less than about 0, and a sodium concentration less than about 50 ppm. This invention also relates to a process for preparing these compounds comprising the step of reacting an isatoic anhydride with approximately stoichiometric amounts of an acylating compound, where the isatoic anhydride is purified by re-crystallization or other purification methods.
本发明涉及具有黄指数小于约0和
钠浓度小于约50 ppm的苯并
噁唑酮化合物。本发明还涉及一种制备这些化合物的方法,包括将
异恶唑酸酐与大约
化学计量量的酰化化合物反应的步骤,其中
异恶唑酸酐通过重结晶或其他纯化方法纯化。