Dimethylacrylamide

The dihydrodiazepine 3 obtained from diaminomaleonitrile and A. A -dimethylacrylamide is dehydrogenated to the diazepine 4 by 2,3-dichloro-5,6-dicyano-l,4-benzoquinone (DDQ).186... 

Keywords antibody catalysts for Diels-Alder reactions between 4-carboxyben-zyl, frans-1,3-butadiene-1-carbamate and N,N-dimethylacrylamide... 

N V-dimethylacrylamide -dodecylamethacrylate (N V-diisopropyl)-acrylamide Methacrylic acid... 

Abbreviations DMAA, A, A -dimethylacrylamide MTEMA, 2-(methyl-thio)ethyl methacrylate MBAA, A, A -methylenebisacrylamide. mmol/gof MTEMA. 

Certain admixtures of carboxymethylhydroxyethylcellulose or copolymers and copolymer salts of N,N-dimethylacrylamide and 2-acrylamido-2-methyl-propane sulfonic acid (AMPS), together with a copolymer of acrylic acid, may... 

Lignite can be grafted with synthetic comonomers to obtain lignite fluid loss additives [873]. Comonomers can be AMPS, N,N-dimethylacrylamide, acrylamide, vinylpyrrolidone, vinylacetate, acrylonitrile, dimethylaminoethyl methacrylate, styrene sulfonate, vinyl sulfonate, dimethylaminoethyl methacrylate methyl chloride quaternary, and acrylic acid and its salts. 

The nonionic monomer can be acrylamide, N,N-dimethylacrylamide, N-vinyl-2-pyrrolidone, N-vinyl acetamide, or dimethylamino ethyl methacrylate. Ionic monomers are AMPS, sodium vinyl sulfonate, and vinylbenzene sulfonate. The terpolymer should have a molecular weight between 200,000 to 1,000,000 Dalton. 

A copolymer of N,N-dimethylacrylamide and N,N-dimethylaminopropyl methacrylamide, a monocarboxylic acid, and ethanolamine may serve to increase the viscosity of diesel or kerosene [846]. 

Synthesis and Characterization of and Drug Release from Poly(A Ar-dimethylacrylamide)-l-polyisobutylene... 

This paper concerns the synthesis and characterization of a series of polyCA N-dimethylacrylamide)-l-polyisobutylene (PDMAAm-l-PIB) amphiphilic networks. The use of these networks as potential drug delivery systems is also demonstrated. 

Materials. Tetrahydrofuran (THF) was freshly distilled from sodium, and triethylamine from P2O5. Methacryloyl chloride (Aldrich Chemical Co.) and NJV-dimethylacrylamide (DMAAm), (Aldrich Chemical Co.) were distilled under reduced pressure prior to use. 2,2 -Azobisisobutyronitrile (AIBN) (Eastman Kodak) and theophylline (Mp 275 °C) (Aldrich Chemical Co.) were recrystallized from methanol and water, respectively. Hexanes, /i-heptane, and ethanol were used as received. 

In 1989, Isayama and Mukaiyama reported a related Co-catalyzed coupling reaction that employs a,b-unsaturated nitriles, amides, and esters with PhSiLb as a hydrogen source [9]. Cobalt-bis(diketonato) complex, Co(II)(dpm)2 [dpm = bis(dipivaloylmethanato)] (5mol%), exhibited high catalytic activity at 20 °C in the coupling of excess acrylonitrile and ben-zaldehyde to provide b-hydroxy nitrile 4 in 93% yield (syn anti = 50 50) (Scheme 5). N,N-Dimethylacrylamide and methyl cinnamate both reacted... 

Controlling fluid loss loss is particularly important in the case of the expensive high density brine completion fluids. While copolymers and terpolymers of vinyl monomers such as sodium poly(2-acrylamido-2-methylpropanesulfonate-co-N,N-dimethylacrylamide-coacrylic acid) has been used (H)), hydroxyethyl cellulose is the most commonly used fluid loss additive (11). It is difficult to get most polymers to hydrate in these brines (which may contain less than 50% wt. water). The treatment of HEC particle surfaces with aldehydes such as glyoxal can delay hydration until the HEC particles are well dispersed (12). Slurries in low viscosity oils (13) and alcohols have been used to disperse HEC particles prior to their addition to high density brines. This and the use of hot brines has been found to aid HEC dissolution. Wetting agents such as sulfosuccinate diesters have been found to result in increased permeability in cores invaded by high density brines (14). 

Copolymers of sodium acrylate with sodium 2-acrylamido-2-methylpropane sulfonate (220) or N,N-dimethylacrylamide (221) have been found useful for preparing crosslinked systems that must function at high temperatures and relatively high salinity. 

Acrylamide copolymers designed to reduce undesired amide group hydrolysis, increase thermal stability, and improve solubility in saline media have been synthesized and studied for EOR applications. These polymers still tend to be shear sensitive. Acrylamide comonomers that have been used include 2-acrylamido-2-methylpropane sulfonate, abbreviated AMPS, (1,321-324), 2-sulfo-ethylmethacrylate (325,326), diacetone acrylamide (324, 326), and vinylpyrrolidinone (327,328). Acrylamide terpolymers include those with sodium acrylate and acrylamido-N-dodecyl-N-butyl sulfonate (329), with AMPS and N,N-dimethylacrylamide (330), with AMPS and N-vinylpyrrolidinone (331), and with sodium acrylate and sodium methacrylate (332). While most copolymers tested have been random copolymers, block copolymers of acrylamide and AMPS also have utility in this application (333). 

Figure 14.6.7 The molecular structure of the hydrophilic nonionic monomer NyN-dimethylacrylamide (DMA).

An interesting antibody-catalyzed intermolecular asymmetric 1,3-dipolar cycloaddition reaction between 4-acetamidobenzonitrile N-oxide and N,N-dimethylacrylamide generating the corresponding 5-acylisoxazoline was observed (216). Reversed regioselectivity of nitrile oxide cycloaddition to a terminal alkene was reported in the reaction of 4-A rt-butylbenzonitrile oxide with 6A-acrylamido-6A-deoxy-p-cyclodextrin in aqueous solution, leading to the formation of the 4-substituted isoxazoline, in contrast to the predominance of the 5-substituted regioisomer from reactions of monosubstituted alkenes (217). 

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