Synthesis and properties of methyleneoxyamine derivatives of 1-(propylthio)octane
摘要:
Synthesis of new methyleneoxyamine derivatives of 1-(propylthio)octane by condensation of 1-(propylthio)octane with secondary amines and formaldehyde was carried out. Structure of the synthesized compounds was proved by elemental analysis, IR, (1)H NMR, and mass spectra. Compounds were tested as antimicrobial additives to lubricating oils. They were found to suppress effectively the activity of microorganisms.
A One-Pot Reaction of α-Imino Rhodium Carbenoids and Halohydrins: Access to 2,6-Substituted Dihydro-2<i>H</i>-1,4-oxazines
作者:Kieran D. Jones、Michael J. Nutt、Elena Comninos、Alexandre N. Sobolev、Stephen A. Moggach、Tomoya Miura、Masahiro Murakami、Scott G. Stewart
DOI:10.1021/acs.orglett.0c00947
日期:2020.5.1
a Rh(II)-catalyzed reaction between 1-tosyl-1,2,3-triazoles and halohydrins to provide 2,6-substituted 3,4-dihydro-2H-1,4-oxazines under basic conditions. The reaction is proposed to undergo a rhodiumcarbenoid 1,3-insertion into O-H followed by an annulation. The scope includes phenyl or alkenyl C4-substituted triazoles and a range of halohydrins using catalytic Rh2Oct4 and K2CO3. A synthesis of the
Comparative study of the vicinal functionalization of olefins with 2:1 bromide/bromate and iodide/iodate reagents
作者:Manoj K. Agrawal、Subbarayappa Adimurthy、Bishwajit Ganguly、Pushpito K. Ghosh
DOI:10.1016/j.tet.2009.01.095
日期:2009.4
halohydrins, halo methyl ethers, and halo acetates from olefins using 2:1 Br−/BrO3− and I−/IO3− reagents. In many cases both reagents afforded products selectively in high yields. The highest halogen atom efficiencies attained were 97% and 93% for Br−/BrO3− and I−/IO3−, respectively. Of the two reagents, I−/IO3− was established to be the preferred reagent for vicinal functionalization of linear alkenes and
NaIO<sub>4</sub>-Mediated Selective Oxidative Halogenation of Alkenes and Aromatics Using Alkali Metal Halides
作者:Gajanan K. Dewkar、Srinivasarao V. Narina、Arumugam Sudalai
DOI:10.1021/ol0358206
日期:2003.11.1
[reaction: see text] NaIO(4) oxidizes alkali metal halides efficiently in aqueous medium to halogenate alkenes and aromatics and produce the corresponding halo derivatives in excellent regio and stereoselectivity. The system also demonstrates the asymmetric version of bromo hydroxylation using beta-cyclodextrin complexes, resulting in moderate ee.
Trihaloisocyanuric Acid/Triphenylphosphine: An Efficient System for Regioselective Conversion of Epoxides into Vicinal Halohydrins and Vicinal Dihalides under Mild Conditions
作者:Marcio de Mattos、Vitor de Andrade
DOI:10.1055/s-0035-1560408
日期:——
vicinal chloro-/bromohydrins and vicinal dihalides by reaction with the system trihaloisocyanuric acid/triphenylphosphine in acetonitrile under mild and neutral conditions. The reactions proceed smoothly in high yield at room temperature and at reflux, respectively, over a short time. A new synthetic method has been developed for the regioselective conversion of epoxides to vicinal chloro-/bromohydrins
The ringopening of epoxides with elementaliodine and bromine in the presence of three pyridine-containing macrocyclic diamides as new catalysts affords vicinal iodo alcohols and bromo alcohols in high yields. This new procedure occurs regioselectively under mild conditions in various aprotic solvents. The catalysts are easily recovered and can be reused several times.