The structure of a new anti-viral antibiotic, julimycin B-II, has been established as a derivative of β,β'-bianthraquinonyl by spectroscopic and degrative experiments.
Gas-chromatographic identification of products formed in iodination of methyl phenols by retention indices
作者:I. V. Gruzdev、I. M. Kuzivanov、I. G. Zenkevich、B. M. Kondratenok
DOI:10.1134/s1070427212090108
日期:2012.9
Iodination reaction followed by conversion of iodine-substituted methylphenols to the corresponding trifluoroacetates was suggested for improving the sensitivity of the gas-chromatographic determination of phenol and its methyl-substituted derivatives (al isomers of mono-and diethylphenols, 2,3,5-, 2,3,6-, and 3,4,5-trimethylphenols) in aqueous media. Acylation products of iodo methylphenols (104 compounds) were identified by linear-logarithmic retention indices on a standard nonpolar polydimethylsiloxane stationary phase, and the pattern of their variation with the number and nature of substituents were characterized. A procedure for identification of methyl-substituted phenols in water in their gas-chromatographic determination with an electron-capture detector was developed.
Synthesis, Characterization, X-Ray Structural Analysis, and Iodination Ability of Benzyl(triphenyl)phosphonium Dichloroiodate
作者:Hossein Imanieh、Shahriar Ghammamy、Mir Mohammad Alavi Nikje、Farhang Hosseini、Zahra Shokri Aghbolagh、Hoong-Kun Fun、Hamid Reza Khavasi、Reza Kia
DOI:10.1002/hlca.201100198
日期:2011.12
efficient and selective iodination of organic substrates, in particular of aromatic phenols to the corresponding iodo compounds, under mild conditions. To assess the generality of method, a wide variety of phenols with electron‐donating and electron‐withdrawing substituents were studied. BTPPICl2 is a mild iodination reagent, which offers a new avenue for an expeditious iodination of phenols. The inexpensive