Synthesis and complete assignment of the 1H and 13C NMR spectra of 6-substituted and 2,6-disubstituted pyridazin-3(2H)-ones
作者:Pedro Besada、Tamara Costas、Noemi Vila、Carla Chessa、Carmen Terán
DOI:10.1002/mrc.2755
日期:2011.7
Several pyridazin‐3(2H)‐one derivatives were synthesized starting from alkyl furans using oxidation with singlet oxygen to give 4‐methoxy or 4‐hydroxybutenolides, key intermediates of the synthetic strategy followed. For all pyridazinones reported, a complete assignment of the 1H and 13C NMR spectra using one‐ and two‐dimensional NMR spectroscopic methods, which included NOE, DEPT, COSY, HSQC and HMBC
以烷基呋喃为原料,用单线态氧氧化得到 4-甲氧基或 4-羟基丁烯内酯,合成了几种哒嗪-3(2H)-酮衍生物,随后是合成策略的关键中间体。对于所有报道的哒嗪酮,使用一维和二维 NMR 光谱方法(包括 NOE、DEPT、COSY、HSQC 和 HMBC 实验)完成了 1H 和 13C NMR 光谱的完整分配。分析了杂环原子的化学位移与 N-2 和 C-6 上的取代基之间的相关性。版权所有 © 2011 John Wiley & Sons, Ltd.