5427-26-9Relevant articles and documents
EFFECT OF THE REACTION MEDIUM ON THE BROMOCYCLIZATION OF MALEIC AND FUMARIC ACID MONOUREIDES
Yurgevitsa, I. K.,Kupche, E. L.
, p. 1115 - 1121 (1980)
The monopotassium salt of maleic acid monoureide is brominated in water in the same way as the free acid, whereas the trans isomer is not brominated at all. Bromocyclization of the monopotassium salt of the cis isomer to give 5-(bromocarboxymethyl)hydantoin and intramolecular cyclization to give 5-(carboxymethyl)hydantoin are realized at pH 4-6. erythro-2,3-Dibromosuccinic acid and 5-(bromo-carboxymethyl)hydantoin are formed in the bromination of the monopotassium salt of fumaric acid monoureide at pH 4-6.Bromination of the methyl ester of maleic acid monoureide in 1,2-dichloroethane proceeds in the same way as bromination in water to give 2-amino-5-oxazolid-4-one.
PROCESS FOR STRAIGHTENING KERATIN FIBRES WITH A HEATING MEANS AND DENATURING AGENTS
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, (2010/03/02)
The invention relates to a process for straightening keratin fibres, comprising: (i) a step in which a straightening composition containing at least two denaturing agents is applied to the keratin fibres, (ii) a step in which the temperature of the keratin fibres is raised, using a heating means, to a temperature of between 110 and 250° C.
Synthesis and in vitro anticancer activity of 2,4-azolidinedione-acetic acids derivatives
Kaminskyy, Danylo,Zimenkovsky, Borys,Lesyk, Roman
scheme or table, p. 3627 - 3636 (2009/12/04)
The synthesis and evaluation of anticancer activity of 2,4-thia(imida)zolidinedione-3- and 5-acetic acids amides were described. The structures of compounds were determined by IR, 1H NMR, and MS analysis. In vitro anticancer activity of these compounds has been tested in National Cancer Institute (NCI) and the relationships between structure and anticancer activity are discussed. Among 2,4-azolidinedione-acetic acids derivatives 2-[5-(4-chlorobenzylidene)-2,4-dioxo-imidazolidin-3-yl]-N-(2-trifluoromethyl-phenyl)-acetamide (Ic) was superior to other related compounds in terms of high selectivity for the leukemia CCRF-CEM (log GI50 = -6.06), HL-60(TB) (log GI50 = -6.53), MOLT-4 (log GI50 = -6.52) and SR (log GI50 = -6.51) cell lines.
Formation of N-Carbamoylaspartic Acid and Its Cyclisation to Orotic Acid
Bruce, Michael J.,Butler, Anthony R.,Russell, Kate V.
, p. 319 - 322 (2007/10/02)
The stereochemistries of the reactions between cyanate and aspartic acid and 3-methylaspartic acid have been examined.The product of the first reaction, N-carbamoylaspartic acid 3, can cyclise to give either dihydroorotic acid 5 or 5-carboxymethylmydantoin 4.Acid catalysed cyclisation gives the latter while catalysis by the enzyme dihydroorotase gives the former.Introduction of a double bond into 3 changes the course of non-enzymatic cyclisation and a six-membered ring compound orotic acid 1 is the product.It is proposed that the double bond prevents intramolecular hydrogen bonding.