Metal-free intramolecular oxidative cyclization of (Z)-2-benzamido-3-arylacrylates using I2/DMSO: Synthesis of 2,4,5-trisubstituted oxazoles
作者:Rameshwar S. Shinde、Aditya R. Narnawre、Nandkishor N. Karade
DOI:10.1016/j.tetlet.2023.154370
日期:2023.3
The (Z)-2-benzamido-3-arylacrylates were found to undergo intramolecular oxidative CO bond formation using 5 mol% iodine in DMSO to furnish diversely substituted 2,4,5-trisubstituted oxazoles in good to excellent yields. The advantages of the methodology are metal-free and base-free oxidative conditions, inexpensive and readily available oxidant, simple experimental procedure and broad substrate scope
发现( Z )-2-苯甲酰氨基-3-芳基丙烯酸酯在 DMSO 中使用 5 mol% 的碘进行分子内氧化 C O 键形成,以良好至优异的收率提供不同取代的 2,4,5-三取代恶唑。该方法的优点是无金属和无碱氧化条件、廉价且容易获得的氧化剂、简单的实验程序和广泛的底物范围。