Stereospecific Electrophilic Fluorocyclization of α,β-Unsaturated Amides with Selectfluor
作者:Haiyang Fei、Zheyuan Xu、Hongmiao Wu、Lin Zhu、Hitesh B. Jalani、Guigen Li、Yao Fu、Hongjian Lu
DOI:10.1021/acs.orglett.0c00620
日期:2020.4.3
An efficient fluorocyclization of α,β-unsaturated amides through a formal halocyclization process is developed. The reaction proceeds under transition-metal-free conditions and leads to the formation of fluorinated oxazolidine-2,4-diones with excellent regio- and diastereoselectivity. The evaluation of the reaction mechanism based on preliminary experiments and density functional theory calculations
通过正式的卤代环化过程,开发了一种高效的α,β-不饱和酰胺的氟环化方法。该反应在无过渡金属的条件下进行,并导致形成具有优异的区域和非对映选择性的氟化恶唑烷-2,4-二酮。基于初步实验和密度泛函理论计算对反应机理的评估表明,发生了协同的顺-氧代氟化反应,随后发生了反-氧代取代反应。该反应打开了立体特异性氟官能化领域的新窗口。