Synthesis and NMR spectroscopic studies of allylsulfanyl-N1-alkyl-N4-phenyl-1,4-phenylenediamines and their cyclization products, 2,3-dihydro-1-benzothiophenes and thiochromans
作者:Alan R. Katritzky、Novruz G. Akhmedov、Mingyi Wang、Charles J. Rostek、Peter J. Steel
DOI:10.1002/mrc.1462
日期:2004.12
4‐phenylenediamines 5–8 and cyclization products 9–14 were completely analyzed in both CDCl3 and DMSO‐d6 solutions. The 1H and 13C NMR spectra of 10 and 11, which contain two chiral centers, exhibit duplication for several signals, indicating the existence of two diastereomeric forms. The full structures of 5 and 9 were unambiguously confirmed by x‐ray crystallography. The 1H and 13C NMR spectra of all compounds
通过 1D NOE 差异结合 gHMBC 实验,严格证实了在与化合物 1-4 的 1,4-苯二胺部分的带有苯基的氮相邻的 C-3 位置上烯丙基硫醇的区域选择性加成。1,4-苯二胺1-4、烯丙基硫烷基-N1-烷基-N4-苯基-1,4-苯二胺5-8和环化产物9-14的结构在CDCl3和DMSO-d6溶液中进行了完整的分析。包含两个手性中心的 10 和 11 的 1H 和 13C NMR 光谱显示出多个信号的重复,表明存在两种非对映体形式。X 射线晶体学明确证实了 5 和 9 的完整结构。所有化合物的 1H 和 13C NMR 谱均使用一维和二维 NMR 技术(APT、DEPT、1D NOE 差异、COSY、NOESY、HETCOR、gHMQC 和 gHMBC)。版权所有 © 2004 John Wiley & Sons, Ltd.