Oxidative coupling of 1-alkyl(benzyl)-4-(gamma-Pyridyl)-1,2,5,6-tetrahydropyridines with acetone in the presence of KMnO4 follows two pathways and yields both 1-R-2-(acetylmethylene)tetrahydropyridines and 1-R-3,4-dihydroxypiperidin-2-ones. When acetonitrile is used instead of acetone, the reaction under similar conditions occurs as selective ketodihydroxylation of the starting piperideines yielding 1-R-3,4-dihydroxy-4(gamma-Pyridyl)piperidin-2-ones . The molecular and crystal structures of one of these products (R = Et) was studied by X-ray diffraction analysis.
approximation is used to investigate the complex formation of monosubstituted 4,4′-bipyridinium salts BpyR (Hal) containing a halide anion interacting with the quaternary nitrogen atom and carboxylic group of the two-units construct. Significant effect of the BpyR (Hal) electronic structure is unveiled that contributes in two different structures of these salts, namely, partial charge transfer complex and
A Series of Polyoxometalate‐Viologen Photochromic Materials for UV Probing, Amine Detecting and Inkless and Erasable Printing
作者:Jun Ying、Liang Jin、Chen‐Xi Sun、Ai‐Xiang Tian、Xiu‐Li Wang
DOI:10.1002/chem.202103268
日期:2022.1.10
Compounds were designed and constructed by using two viologen ligands. Compounds 1–3 show excellent photochromic features with fast photoresponse under irradiation of ultraviolet light with different degrees of color changes. These Compounds exhibit aminedetecting and inkless and erasableprinting properties, and they can be prepared into a mixed matrix film as a good UV detector.
作者:A. T. Soldatenkov、I. A. Bekro、S. A. Soldatova、E. Glover、A. Temesgen、L. N. Kuleshova、V. N. Khrustalev、N. D. Sergeeva
DOI:10.1007/bf02503786
日期:1997.11
Oxidative coupling of 1-alkyl(benzyl)-4-(gamma-Pyridyl)-1,2,5,6-tetrahydropyridines with acetone in the presence of KMnO4 follows two pathways and yields both 1-R-2-(acetylmethylene)tetrahydropyridines and 1-R-3,4-dihydroxypiperidin-2-ones. When acetonitrile is used instead of acetone, the reaction under similar conditions occurs as selective ketodihydroxylation of the starting piperideines yielding 1-R-3,4-dihydroxy-4(gamma-Pyridyl)piperidin-2-ones . The molecular and crystal structures of one of these products (R = Et) was studied by X-ray diffraction analysis.