Electron-Transfer-Mediated Synthesis of Phenanthridines by Intramolecular Arylation of Anions from N-(ortho-Halobenzyl)arylamines: Regiochemical and Mechanistic Analysis
摘要:
The synthesis of a series of substituted phenanthridines by photostimulated C-C cyclization of anions from N-(ortho-halobenzyl)arylamines has been found to proceed in very good to excellent yields (79-95%) in liquid ammonia and in DMSO. The N-(ortho-halobenzyl)arylamines are obtained in good to very good isolated yields (44-85%) by nucleophilic substitution of ortho-halobenzylchlorides with different arylamines. The reaction of the anions of a diverse set of N-(ortho-halobenzyl)arylamines was studied, and the methodology was extended to the synthesis of tri-spheridine, a natural product, in very good yield. In order to explain the regiochemical outcome or these reactions, a theoretical analysis was performed with DFT methods and the B3LYP functional.
使用不对称的2-(二苯基膦基)氨基苯并噻唑(DPA)通过共掺杂C 3 N 4合成非均相且可回收的钯复合材料。通过扫描电子显微镜、透射电子显微镜、X 射线光电子能谱、X 射线衍射、N 2吸附等温线、热重分析和能量色散 X 射线光谱对所得钯复合材料 (DPA-Pd@gC 3 N 4 ) 进行了仔细表征. 此外,复合 DPA-Pd@gC 3 N 4通过借氢策略成功应用于2-氨基吡啶与苯甲醇反应合成N-取代氨基吡啶衍生物。 图形概要 通过C 3 N 4掺杂Pd合成了相应的钯非均相催化剂,对合成N-取代氨基吡啶具有较高的催化活性和良好的回收性能。