An iodine-catalyzed aerobicoxidative formal [4+2] annulation for the construction of polyfunctionalized pyridines in one step has been developed through the green reaction system of catalytic amounts of molecular iodine and amine in combination with oxygen. Various ketones and aldehydes were able to react with different chalcones and β, γ-unsaturated α-ketoesters through this reaction strategy. Synthetically
Thermal rearrangement of pyridinium anhydrobases: migration of N-substituents to methine carbon
作者:Alan R. Katritzky、Radi Awartani
DOI:10.1016/0040-4020(82)85086-2
日期:1982.1
N-Benzyl and N-methyl groups migrate to the methinecarbon atom on thermolysis of pyridiniumanhydrobases. Cross-over experiments indicate an intermolecular reaction, probably involving homolysis.
Addition of cylohexanone to chalcones, obtained from the appropriate acetophenone and benzaldehyde derivatives, under solvent-free conditions gave 1,5-diketones in good yields. Treatment of 1,5-diketones with ammonium acetate in acetic acid afforded directly 2,4-diaryl-5,6,7,8-tetrahydroquinolinederivatives in high yields. The structures of were elucidated by 1H NMR, 13C NMR, IR, and elemental analysis
除环己酮,以查耳酮,从相应的苯乙酮和苯甲醛衍生物得到的,无溶剂的条件下的,得到在良好的产率1,5-二酮类。1,5-二酮的治疗乙酸中的乙酸铵直接提供2,4-二芳基-5,6,7,8-四氢喹啉衍生物高产。的结构通过1 H NMR,13 C NMR,IR和元素分析来阐明。J.杂环化学。(2010)。