p-Nitrophenyl α-maltoside
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چکیده
منابع مشابه
CHEMICAL SYNTHESIS OF p-NITROPHENYL p-NITROPHENYL ~LAh%INARABIOSlDE*
Condensation OF tetra-U-acetyk-D-glucopyranosyl bromide withpnitrophenyl 4,6-O-benzylidene-/?-D-glucopyranoside followed by appropriate deblocking reactions gives rise to an approximately equimolar mixture of p-nitrophenyl @,ophoroside and pnitrophenyi Plaminarabioside. The two glycosides are readiIy separated and isolated in pure form by cellulose-column chromatography.
متن کاملPotassium p-nitrophenyl sulfate.
The crystal structure of the title compound, K+.C6H4NO6S-, is built up from p-nitrophenyl sulfate anions and potassium cations. Adjacent anions form dimers, which are linked together in a three-dimensional network via short C-H...O contacts. The coordination sphere of the K+ ions may be described as a distorted square antiprism. The crystal structure is further stabilized by pi-pi stacking inte...
متن کاملThe action of cytoplasmic aldehyde dehydrogenase on methyl p-nitrophenyl carbonate and p-nitrophenyl dimethylcarbamate.
Cytoplasmic aldehyde dehydrogenase catalyses the hydrolysis of methyl p-nitrophenyl (PNP) carbonate at an appreciable rate that is markedly stimualted by NAD+ or NADH. The nuleotides accelerate the rate-limiting hydrolysis of the acyl-enzyme intermediate while slowing the observed burst of p-nitrophenoxide production. With PNP dimethylcarbamate the enzyme catalyses the slow release of approx. 1...
متن کاملCatalytic activity of enzyme in water/organic cosolvent mixtures for the hydrolysis of p-nitrophenyl acetate and p-nitrophenyl benzoate
The dependence of the catalytic activities of α-chymotrypsin on the concentration of organic cosolvents (acetonitrile, dimethyl sulfoxide, dimethyl formamide, ethylene glycol, methanol, ethanol, propan-2-ol and tert-butanol) in mixed aqueous media has been studied towards hydrolysis of p-nitrophenyl acetate and p-nitrophenyl benzoate using cetyltriphenylphosphonium bromide surfactant at pH 7.75...
متن کاملHighly Efficient Intramolecular Nucleophilic Reactions. The Cyclization of p-Nitrophenyl
p-Nitrophenyl N-(2-mercaptophenyl)-N-methylcarbamate cyclizes rapidly at 25' to N-methylbenzothiazolone with release of p-nitrophenol. The pH-rate constant profile is sigmoidal with pK,,, = 8.7. The effective molarity of the neighboring sulfhydryl group is 1.4 X los M in comparison with bimolecular attack of thiols on p-nitrophenyl N-methyl-Nphenylcarbamate. The pH-rate constant profile for cyc...
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ژورنال
عنوان ژورنال: Australian Journal of Chemistry
سال: 1971
ISSN: 0004-9425
DOI: 10.1071/ch9710673