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Divinyl sulfone

Reaction conditions depend on the reactants and usually involve acid or base catalysis. Examples of X include sulfate, acid sulfate, alkane- or arenesulfonate, chloride, bromide, hydroxyl, alkoxide, perchlorate, etc. RX can also be an alkyl orthoformate or alkyl carboxylate. The reaction of cycHc alkylating agents, eg, epoxides and a2iridines, with sodium or potassium salts of alkyl hydroperoxides also promotes formation of dialkyl peroxides (44,66). Olefinic alkylating agents include acycHc and cycHc olefinic hydrocarbons, vinyl and isopropenyl ethers, enamines, A[-vinylamides, vinyl sulfonates, divinyl sulfone, and a, P-unsaturated compounds, eg, methyl acrylate, mesityl oxide, acrylamide, and acrylonitrile (44,66). [Pg.109]

Symmetrical 1,4-diketones (249) can be prepared by the reaction of phenyl vinyl sulfones (53) or divinyl sulfone with aldehydes in the presence of 3-benzyl-5-(2-hydroxymethyl)-4-methylthiazolium chloride as a catalyst (equations 148 and 149)142. [Pg.813]

Nucleophilic addition to a, -unsaturated sulfones has long been known. For example, treatment of divinyl sulfone with sodium hydroxide has been known to afford bis( -hydroxyethyl) sulfone "", while the reaction of a- and -naphthyl allyl sulfones and allyl benzyl sulfone " with alkali hydroxide or alkoxide gave -hydroxy or alkoxy derivatives. In the latter reaction, the allyl group underwent prototropy to the 1-propenyl group, which in a subsequent step underwent nucleophilic attack . Amines, alcohols and sulfides are known to add readily to a, -unsaturated sulfones, and these addition reactions have been studied widely. In this section, the addition of carbon nucleophiles to a, ji-unsaturated sulfones and the reactions of the resulting a-sulfonyl carbanions will be examined. [Pg.642]

Polyvinyl alcohols may be applied as such or in crosslinked form [90]. Crosslinkers can be aldehydes (e.g., formaldehyde, acetaldehyde, glyoxal, glutaraldehyde), to form acetals, maleic acid or oxalic acid to form cross-linked ester bridges, or others (e.g., dimethylurea, polyacrolein, diisocyanate, divinyl sulfonate) [89,91]. [Pg.14]

Other biochemicals NADH Synthetic ine) (derivatized with divinyl sulfone) 10 "6 mol L"1... [Pg.222]

Enhancements in the sensitivity with which amino acids containing a primary amine group can be determined have been achieved by derivatization. Chen and Sato [37] reported derivatization with divinyl-sulfone-reduced limits of detection by several orders of magnitude, while Lee and Nieman [38] reported derivatization with dansyl-chloride-reduced limits of detection by a factor of three. [Pg.225]

Primary amines Derivatization with divinyl sulfone, [Ru(bpy)3]2+ ECL 1-30 pmol 74... [Pg.339]

Amino acids labeled with DNS-C1 were determined using the Ru(bpy)32+ CL reaction after HPLC separation with a reversed-phase column [104, 105], DNS derivatives are expected to produce intense CL owing to their secondary and tertiary amino groups. The detection limit for DNS-Glu was 0.1 pM (2 pmol/ injection). Although underivatized amino acids could be detected by Ru(bpy)32+ CL, the DNS derivatives showed improved detection limits by three orders of magnitude [105], An approach to convert primary amines to tertiary amines was also reported [106], In this method, divinyl sulfone (DVS) was used for a cycloaddition reaction of primary amines (Fig. 19). The DVS derivatives after HPLC separation were sensitively detected (e.g., detection limits for propylamine and 3-aminopentane were 30 and 1 pmol, respectively). [Pg.420]

Di(2-pyridyl)-l //-imidazol-2-yl]phenylboronic acid A,A -Disuccinimidyl carbodiimide S -Diethylthiadicarbocyanine iodide Divinyl sulfone Electrochemical... [Pg.595]

Carbohydrates as well as proteins are effectively coupled to divinyl-sulfone-activated agaroses. This variant is often more favorable then the activation by epoxides. As further advantage, the resulting vinyl group serves as a spacer. [Pg.120]

M NaOH to prepare 1.0 ml of 5 wt% solution and then treated with the step 4 product (10 mg) and 10 jjlI of divinyl sulfone. After remaining at 25°C for 20 hours, a gelated body was isolated having a weight ratio of polyvinyl alcohol to the step 4 product of 5 1, respectively. [Pg.638]

Supports activated with divinyl sulfone, like those activated with bisoxirane, can be coupled to underivatized carbohydrates.21 The supports activated with divinyl sulfone couple to the hemiacetal hydroxyl group of the carbohydrate by the vinyl group. Accordingly affinity adsorbents prepared by this method will contain glycosyl units. The structure of the reaction product of L-fucose with agarose activated with divinyl sulfone is shown in 5. [Pg.432]

Another example of the preparation of a special adsorbent is the attachment of L-fucose to agarose activated with divinyl sulfone. This affinity adsorbent was prepared, and used in the purification of two different types of lectin.20 The results on the purification of one lectin on this adsorbent are shown in Fig. 7. [Pg.444]

The literature reports direct grafting by gamma-rays exposure of Nylon fibers or films to the following monomers carbon monoxide (/65), ethylene (157), propylene (157), acetylene (166), butadiene (157.162,163), styrene (158, 161,163,167,168), vinyl chloride (157,163), vinyl fluoride (169-172), vinyl acetate (161,163,173), vinyl propionate (161), vinyl butyrate (161), vinyl crotonate (161), vinyl 2-ethyl hexanoate (161), acrylic add (173,174), methyl acrylate (162, 163), ethyl acrylate (162,163), allyl acrylate (163), methyl methacrylate (28,161, 163,164), butyl methacrylate (161), acrylamide (158), methylol acrylamide (163), acrylonitrile (157,160-163, 167, 175-179), divinyl sulfone (161), vinyl pyridine (167,173), vinyl pyrrolidone (28) and triallyl cyanurate (158). [Pg.106]


See other pages where Divinyl sulfone is mentioned: [Pg.555]    [Pg.594]    [Pg.339]    [Pg.315]    [Pg.97]    [Pg.490]    [Pg.642]    [Pg.97]    [Pg.490]    [Pg.55]    [Pg.221]    [Pg.181]    [Pg.652]    [Pg.824]    [Pg.863]    [Pg.636]    [Pg.637]    [Pg.147]    [Pg.405]    [Pg.414]    [Pg.415]    [Pg.419]    [Pg.432]    [Pg.391]    [Pg.108]    [Pg.987]    [Pg.83]   
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See also in sourсe #XX -- [ Pg.420 ]

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