Preparation, X-ray Structure, and Reactivity of 2-Iodylpyridines: Recyclable Hypervalent Iodine(V) Reagents
作者:Akira Yoshimura、Christopher T. Banek、Mekhman S. Yusubov、Victor N. Nemykin、Viktor V. Zhdankin
DOI:10.1021/jo200163m
日期:2011.5.20
prepared by oxidation of the respective 2-iodopyridines with 3,3-dimethyldioxirane. Structures of 2-iodylpyridine, 2-iodyl-3-isopropoxypyridine, and 2-iodyl-3-propoxypyridine were established by single-crystal X-ray diffraction analysis. 2-Iodyl-3-propoxypyridine has moderate solubility in organic solvents (e.g., 1.1 mg/mL in acetonitrile) and can be used as a recyclablereagent for oxidation of sulfides
Abstract Dowex (strongly acidic cationic exchange resin) polymer is employed as solid acid catalyst for the clean and less hazardous protection of carbonyl compounds as phenylhydrazones and 2,4‐dintrophenylhydrazones in ethanol under reflux conditions. The reactions proceed very smoothly and the yields of the derivatives are excellent.
Mild Oxidative Deprotection of Aromatic Hydrazones and Semicarbazones with KMnO<sub>4</sub>in Ionic Liquid Medium
作者:Javad Safaei-Ghomi、Abdol R. Hajipour
DOI:10.1080/00304948.2011.582013
日期:2011.1
conventional procedures are that they provide greater selectivity, enhanced reaction rates, cleaner products and manipulative simplicity.12 Although some of these conventional methods have convenient protocols with good to high yields, most suffer from at least one of disadvantages such as use of high temperature and long reaction times, moisture sensitivity, high cost and toxicity of the reagents. Ionic
H<sub>2</sub>SO<sub>4</sub>O<sub>2</sub> AS AN EFFICIENT CATALYST FOR THE PREPARATION OF PHENYLHYDRAZONES AND 2,4-DINITROPHENYLHYDRAZONES UNDER SOLVENT-FREE CONDITIONS
作者:Ali Reza Kiasat、Foad Kazemi、Kazem Nourbakhsh
DOI:10.1080/10426500490422227
日期:2004.3.1
HSO mixed with silica gel (1:1) by weight produces a white powder which is an effective catalyst for the conversion of carbonyl compounds to their corresponding phenylhydrazones and 2,4-dintrophenylhydrazones under solvent-free conditions.
Fluorescent sensing of water in DMSO by 2,4-dinitrophenyl hydrazine derived Schiff base
作者:R. Behura、S. Behera、P. Mohanty、P.P. Dash、R. Panigrahi、B.S. Mallik、Suban K. Sahoo、B.R. Jali
DOI:10.1016/j.molstruc.2021.132086
日期:2022.3
analysis of tracewater in organicsolvents remains a hotspot in current research because of the importance in both industrial and laboratory scale chemistry. This study introduced a fluorescence chemosensor (L3) for the detection of tracewater in dimethyl sulfoxide (DMSO). Addition of water into the DMSO solution of L3 resulted a significant fluorescence enhancement at 533 nm with a detection limit of