Conformational study of some N-acyl-2r,6c-diphenylpiperidin-4-one oximes using NMR spectra
作者:J. Chakkaravarthy、G. Muthukumaran、K. Pandiarajan
DOI:10.1016/j.molstruc.2008.02.008
日期:2008.10
-diphenylpiperidin-4-one oxime ( 5 ) has been studied using 1 H, 13 C and two-dimensional NMR spectra. Analysis of the spectral data shows that in 2 , 3 and 5 the NOH group is anti to the alkyl group at C-3. All the five compounds seem to exist largely in boat conformations with one phenyl group in the flagpole position. Analysis on the reported spectral data on N -phenylcarbamoyl- and N -benzoyl-2 r ,6 c -diphenylpiperidin-4-ones
摘要 N -benzoyl-2 r ,6 c -diphenylpiperidin-4-one 肟 ( 1 ), N -benzoyl-3 t -methyl-2 r ,6 c -diphenylpiperidin-4-one 肟 ( 2 ), N - 的立体化学苯甲酰基-3 t -乙基-2 r ,6 c -diphenylpiperidin-4-one 肟 ( 3 ), N -acetyl-2 r ,6 c -diphenylpiperidin-4-one 肟 ( 4 ) 和 N -acetyl-3 t -已使用 1 H、 13 C 和二维 NMR 光谱研究了甲基-2 r ,6 c -diphenylpiperidin-4-one 肟 ( 5 )。光谱数据分析表明,在 2、3 和 5 中,NOH 基团与 C-3 处的烷基相反。所有五种化合物似乎主要以船形构象存在,旗杆位置有一个苯基。对报告的