17452-09-4Relevant articles and documents
Mass Spectrometry of Substituted 1,3-Dihydro-2H-imidazole-2-thiones
Cert, Arturo,Perez-Lanzac, Mariana Trujillo
, p. 203 - 209 (1987)
The electron impact mass spectra of the 4-formyl-1,3-dihydro-2H-imidazole-2-thione, its six 1-methyl(n-propyl, n-hexyl)-3-methyl(phenyl)-disubstituted derivatives, and the 1,3-dihydro-1-phenyl-2H-imidazole-2-thione are discussed.The fragmentation pattern is strongly influenced by the alkyl or phenyl N-substituents, as well as by the length of the alkyl chain.The odd-electron ions containing an N-phenyl-substituent, but not a propyl or hexyl group, eject a hydrogen atom from the phenyl ring, while the presence of a long alkyl chain greatly enhances the loss of the sulphyhydryl radical and facilitates the expulsion of several alkenes, and alkyl and alkenyl radicals.
Method for preparing cyclic thiourea compound
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, (2021/12/07)
The method comprises the following steps: suspending metal hydride in anhydrous THF, dropwise adding ring thiourea in the stirring process, stirring at room temperature after completion of stirring, stirring at room temperature, TLC monitoring reaction co
New bis(mercaptoimidazolyl)(pyrazolyl)borate ligands and their zinc complex chemistry
Shu, Mouhai,Walz, Rainer,Wu, Biao,Seebacher, Jan,Vahrenkamp, Heinrich
, p. 2502 - 2511 (2007/10/03)
Nine new tripodal NS2 ligands of the bis(mercaptoimidazolyl)(pyrazolyl)borate type with varying 3-R-mercaptoimidazolyl moieties were prepared as their potassium salts. Treatment with zinc salts yielded the complex types L·Zn-Cl, L·Zn-I, L·Zn-ONO2, L·Zn-OClO3 and [L·Zn(imidazole)]ClO4. Attempts at the formation of L·Zn-OH or cationic L·Zn complexes resulted in dismutation and formation of ZnL2 complexes. Hydrolytic destruction yielded one [OZn4(thiooimidazolate)6] complex. The ZnS2NO coordination which is present in the enzyme-substrate complex of alcohol dehydrogenase could be successfully modelled by an [L·Zn(C2H5OH)]+ complex. The L·Zn-X complexes showed very low catalytic activity in the dehydrogenation of 2-propanol or the hydrogenation of p-nitrobenzaldehyde. The new compounds were identified by a total of 12 structure determinations. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003.