The Chemo-selective Reaction of 2-Amino-<i>N′</i>
-arylbenzohydrazide and Ketonic Acid Catalyzed by Iodine for the Synthesis of Quinazoline Derivatives
作者:Jian-Quan Liu、Wen-Ting Zhang、Xiang-Shan Wang
DOI:10.1002/jhet.3228
日期:2018.8
The chemo‐selective reaction of 2‐amino‐N′‐arylbenzohydrazide and ketonic acid catalyzed by iodine was used to synthesize various 2,3‐dihydroquinazolin‐4(1H)‐ones efficiently. The use of levulinic acid furnished a series of 2,3,3a,4‐tetrahydropyrrolo[1,2‐a]quinazoline‐1,5‐diones in high yields, while acetobutyric acid only afforded the quinazoline skeletons without forming the second pyridine ring
碘催化2-氨基N'-芳基苯并肼与酮酸的化学选择性反应可有效合成各种2,3-二氢喹唑啉-4(1 H)-酮。乙酰丙酸的使用可高收率地提供一系列2,3,3 a,4-四氢吡咯并[1,2- a ]喹唑啉-1,5-二酮,而乙酰丁酸仅提供了喹唑啉骨架而未形成第二个吡啶戒指。使用醇代替离子液体作为溶剂,随后以一锅法对乙酰丁酸底物的羧基进行酯化反应。