An efficient procedure for the one-pot chemoselective synthesis of 2H-benzo[b][1,4]oxazin-3(4H)-one derivatives from their corresponding o-aminophenols is developed using DBU in the ionicliquid [omim][BF4]. Upon completion of the reaction and separation of the product, the ionicliquid is recovered and successfully reused over nine recycles without any noticeable loss of performance.
在离子液体中使用DBU开发了一种从其相应的邻氨基苯酚一锅化学选择合成2 H-苯并[ b ] [1,4]恶嗪-3(4 H)-one衍生物的有效方法。 [BF 4 ]。反应完成并分离出产物后,将离子液体回收并在9个循环中成功重复使用,而不会造成任何明显的性能损失。
K<sub>2</sub>CO<sub>3</sub>/H<sub>2</sub>O in [omim][BF<sub>4</sub>] Ionic Liquid: A Green Medium for Efficient Room-Temperature Synthesis of<i>N</i>-Substituted 1,4-Benzoxazin-3-ones
A medium consisting of K2CO3 and H2O in [omim][BF4] ionicliquid (IL) was used to synthesize N‐substituted 2H‐benzo[b][1,4]oxazin‐3(4H)‐one derivatives from their corresponding o‐aminophenols and 2‐bromoalkanoates. As a result, chemoselective formation of benzoxazinones in high yields has been observed at roomtemperature. After the reactions and separation of the products, the IL was recovered and
使用在[omim] [BF 4 ]离子液体(IL)中由K 2 CO 3和H 2 O组成的介质合成N-取代的2 H-苯并[ b ] [1,4]恶嗪-3(4 H)-一种来自其相应的邻-氨基苯酚和2-溴代链烷酸酯的衍生物。结果,在室温下已观察到高产率的苯并恶嗪酮的化学选择性形成。在反应和产物分离之后,回收了IL,并成功地将其重新用于随后的反应中,而没有明显的活性损失。