353-09-3Relevant articles and documents
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.
Structural and functional characterization of plant aminoaldehyde dehydrogenase from pisum sativum with a broad specificity for natural and synthetic aminoaldehydes
Tylichova, Martina,Kopecny, David,Morera, Solange,Briozzo, Pierre,Lenobel, Rene,Snegaroff, Jacques,Sebela, Marek
experimental part, p. 870 - 882 (2011/04/24)
Aminoaldehyde dehydrogenases (AMADHs, EC 1.2.1.19) belong to the large aldehyde dehydrogenase (ALDH) superfamily, namely, the ALDH9 family. They oxidize polyamine-derived ω-aminoaldehydes to the corresponding ω-amino acids. Here, we report the first X-ray structures of plant AMADHs: two isoenzymes, PsAMADH1 and PsAMADH2, from Pisum sativum in complex with β-nicotinamide adenine dinucleotide (NAD+) at 2.4 and 2.15 A resolution, respectively. Both recombinant proteins are dimeric and, similarly to other ALDHs, each monomer is composed of an oligomerization domain, a coenzyme binding domain and a catalytic domain. Each subunit binds NAD+ as a coenzyme, contains a solvent-accessible C-terminal peroxisomal targeting signal (type 1) and a cation bound in the cavity close to the NAD+ binding site. While the NAD+ binding mode is classical for PsAMADH2, that for PsAMADH1 is unusual among ALDHs. A glycerol molecule occupies the substrate binding site and mimics a bound substrate. Structural analysis and substrate specificity study of both isoenzymes in combination with data published previously on other ALDH9 family members show that the established categorization of such enzymes into distinct groups based on substrate specificity is no more appropriate, because many of them seem capable of oxidizing a large spectrum of aminoaldehyde substrates. PsAMADH1 and PsAMADH2 can oxidize N,N,N-trimethyl-4-aminobutyraldehyde into γ-butyrobetaine, which is the carnitine precursor in animal cells. This activity highly suggests that in addition to their contribution to the formation of compatible osmolytes such as glycine betaine, β-alanine betaine and γ-aminobutyric acid, AMADHs might participate in carnitine biosynthesis in plants.
Amidination of amines under microwave conditions using recyclable polymer-bound 1H-pyrazole-1-carboxamidine
Solodenko, Wladimir,Broeker, Patrick,Messinger, Josef,Schoen, Uwe,Kirschning, Andreas
, p. 461 - 466 (2007/10/03)
A convenient one-step transformation of primary and secondary amines into the corresponding unprotected guanidines using 4-benzyl-3,5-dimethyl-1H- pyrazole-1-carboxamidine and its polymer-bound variant is described. The scopes and limitations of the method, the microwave-assistance of amidination as well as a recycling protocol are examined. Georg Thieme Verlag Stuttgart.
A new reagent and its polymer-supported variant for the amidination of amines
Dr?ger, Gerald,Solodenko, Wladimir,Messinger, Josef,Sch?n, Uwe,Kirschning, Andreas
, p. 1401 - 1403 (2007/10/03)
New reagents for the high yielding amidination of primary and secondary amines are described. By attaching a benzyl substituent to the 3,5-dimethyl-1H-pyrazole-1-carboxamidine ring, a reagent 1 is obtained which allows easy work-up after amidination because of solubility of byproducts in organic solvents. In addition, the polystyrene-bound analogue 2 was prepared which allows amidination of various amines with high purity.
Preparation of N-formamidinylamino acids from amino and formamidinesulfinic acids
Jursic,Neumann,McPherson
, p. 1656 - 1658 (2007/10/03)
A practical synthetic procedure for the conversion of amino acids into N-formamidinylamino acids using formamidinesulfinic acid in basic water solution is presented.
Wrinkle-care product
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, (2008/06/13)
A wrinkle-care product, an aging-preventive cosmetic and a skin cosmetic each comprising a guanidine derivative of formula (I) or an acid addition salt thereof: STR1 wherein R1 represents a hydrogen atom, a lower alkyl group or --(AO)m --(BO)n --D--E ?wherein A and B may be the same or different and each represents an alkylene group having 2 to 8 carbon atoms; D represents a binding hand, --CO--, or an unsubstituted or substituted alkylene group having 1 to 6 carbon atoms; E represents a hydrogen atom, a lower alkyl group, an aralkyl group or an unsubstituted or substituted aryl group; m is a number of from 1 to 6; and n is a number of from 0 to 6!; k is a number of from 1 to 10; and G represents a hydrogen atom, a hydroxyl group, a carboxyl group, a sulfonate group or a phosphate group. These products are excellent in the effects of inhibiting wrinkling and smoothing wrinkles without damaging the physiological conditions of the skin.
A Facile Conversion of Amino Acids to Guanidino Acids
Miller, Audrey E.,Bischoff, Judith J.
, p. 777 - 779 (2007/10/02)
The conversion of amino acids to guanidino acids by the action of aminoiminomethanesulfonic acids (2a-c) is reported.Compounds 2a-c were synthesized by peracetic acid oxidation of the corresponding thioureas.
Methods and compositions for inducing resistance to bacterial infections
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, (2008/06/13)
A variety of substances are reported which alter host resistance to cocci and bacilli bacterial infections. Nevertheless, because of the extreme difficulty of total eradication, and the frequent reappearance of the same strains, even after their apparently successful elimination, there is a continuing need for drugs for the treatment of coccic infections. Certain guanidinoacylhistidines are effective in inducing resistance to infections due to cocci and bacilli.