Conformational analysis of 2,6-diarylpiperidin-4-one hydrazones by X-ray diffraction and NMR spectroscopy
作者:C. Sankar、S. Umamatheswari、K. Pandiarajan
DOI:10.1016/j.molstruc.2014.10.015
日期:2015.3
derived from the condensation of 3t-alkyl-2r,6c-diarylpiperidin-4-ones with isoniazid (INH) is reported. Newly synthesized compounds have been characterized by using elemental analysis, IR, 1H, 13C and 2D NMR spectral analysis. Moreover, representative crystal structure of 3,3-dimethyl-2r,6c-diarylpiperidin-4-one N-isonicotinoylhydrazone has been determined by X-ray diffraction analysis. NMR data revealed
摘要 由 3t-烷基-2r,6c-diarylpiperidin-4-ones 与异烟肼 (INH) 缩合得到的一系列新的 3t-烷基-2r,6c-diarylpiperidin-4-one N-异烟酰腙 (12-22) 是报道。新合成的化合物已通过元素分析、IR、1H、13C 和 2D NMR 光谱分析进行了表征。此外,3,3-二甲基-2r,6c-diarylpiperidin-4-one N-异烟酰腙的代表性晶体结构已通过 X 射线衍射分析确定。核磁共振数据显示,在所有情况下都形成了两种几何异构体(E 和 Z),并且哌啶环采用椅子构象。而在固态下,化合物在 CN 键周围具有 E 构型。这些结论也得到了化合物 16 的 X 射线数据的证实。