The reaction between sulfur(IV) oxide and aqueous methylamine yields "onium" sulfate (CH3NH3)(2)SO4, which was characterized by X-ray diffraction, IR spectroscopy, and mass spectrometry. The structure of the sulfate is stabilized by a network of NHa <...a <...a <...O hydrogen bonds.
Novel 3-acetyl-2-methyl-polyfluorochromones in reactions with amines and esters of amino acids
作者:Konstantin V. Shcherbakov、Denis N. Bazhin、Yanina V. Burgart、Victor I. Saloutin
DOI:10.1007/s10593-016-1805-y
日期:2015.11
one-pot acylation of acetylacetone with polyfluorobenzoyl chlorides. These chromones were shown to form N-substituted 3-amino-1-[2-hydroxy(polyfluoro)phenyl]but-2-en-1-ones in reaction with aliphatic primary amines, esters of amino acids, and aqueous ammonia via opening of the pyrone ring and deacylation.
FTIR and Ramanspectra of Na2Cu(SO4)2·2H2O and (CH3NH3)2M(II)(SO4)2·6H2OwithM(II)=Cu, Zn, and Ni are recorded and analyzed. Bands are assigned on the basis of SO2−4, CH3NH+3, and H2O vibrations. The lifting of degeneracies ofν2,ν3, andν4modes and the appearance ofν1andν2modes in the IR spectra confirm the lowering of symmetry of the SO2−4ion fromTdtoC1in all of the title compounds. Bands obtained
6-Polyfluoroalkylated 2-thiouracils in the synthesis of pyrimido[2,1-b][1,3,5]thiadiazines by the double Mannich reaction
作者:Ol’ga G. Khudina、Anna E. Ivanova、Yanina V. Burgart、Victor I. Saloutin、Marionella A. Kravchenko
DOI:10.1016/j.jfluchem.2013.01.018
日期:2013.3
groups to yield pyrimido[2,1-b][1,3,5]thiadiazines via the multicomponent double Mannichreaction. The structure of 3-benzyl-8-nonafluorobutyl-3,4-dihydro-2H,6H-pyrimido[2,1-b][1,3,5]thiadiazin-6-one was studied by the X-ray diffraction analysis. The use of ethylenediamine in these reactions yields 3,3′-ethane-1,2-diyl-bis(pyrimido[2,1-b]thiadiazinone) as a result of the bis-double Mannich cyclocondensation