74440-80-5Relevant articles and documents
Polymer-anchored peroxo compounds of molybdenum and tungsten as efficient and versatile catalysts for mild oxidative bromination
Boruah, Jeena Jyoti,Das, Siva Prasad,Borah, Rupam,Gogoi, Sandhya Rani,Islam, Nashreen S.
, p. 246 - 254 (2013/05/23)
A polymer supported peroxomolybdate(VI) compound of the type [MoO 2(O2)(CN)2]-PAN [PAN = poly(acrylonitrile)] (PANMo) was obtained by reacting H2MoO4 with 30% H 2O2 and the macromolecular ligand, PAN at near neutral pH. The macrocomplex has been characterized by elemental analysis (CHN and EDX analysis), spectral (IR, UV-Vis and 13C NMR, 95Mo NMR), thermal (TGA-DTG) as well as SEM studies. The catalytic activity of PANMo and its previously reported tungsten containing analog PANW, in oxidative bromination of organic substrates has been explored. The supported complexes could serve as efficient heterogeneous catalysts for the oxidative bromination of a variety of structurally diverse aromatic compounds, with H 2O2 as terminal oxidant, to afford bromo organics in impressive yields under environmentally clean conditions. The catalysts afforded regeneration and could be reused for a minimum of six reaction cycles.
Heterocycle annulation of enolizable vinyl quinone imides. Dihydroquinolines and quinolines from thermal 6π-electrocyclizations and indoles from photochemical cyclizations
Parker, Kathlyn A.,Mindt, Thomas L.
, p. 4265 - 4268 (2007/10/03)
(equation presented) Enolizable vinyl quinone mono-and diimide substrates yield protected 6-hydroxy and 6-amino dihydroquinolines by thermal electrocyclization. Aromatization provides the corresponding quinolines in quantitative yields. The quinone monoimide substrates undergo clean photochemical conversion to 5-hydroxy indoles.