Ethyl aaylate

Smets and coworkers worked with stretched spirobenzopyran rubber networks obtained by copolymerization of ethyl aaylate with variaWe amounts of a bis-photochrome dimethacrylate as cross-linking agent, namely l,l -(a,a -p-xylyl)-bis-[3, 3 -dimethyl-8-methacryloyloxymethyl-6-nitro-spiro(2H-l-benzopyran-2,2 -indoline)]. The chemical structure of these DIPS-rubbers is given in Fig. 11. 

Flexible permanent magnets are used for signs, electric motors, toys, sealing strips, etc. They are fabricated from compounds with up to 90 percent by weight of magnetizable filler. Binders can be chlorinated and chlorosulfonated polyethylene, various vinyl compounds, nitrile rubber, and ethylene/ethyl aaylate copolymers. Magnetization is typically accomplished, via a magnetic field, after extrusion. 

Fifteen flavorant compounds approved by the Flavor and Extract Manufacturers Association (FEMA) for the GRAS list have been found to be carcinogenic to laboratory animals. These inclnde benzyl acetate, cinnamyl anthranilate, ethyl aaylate, and pyridine [66]. Thongh the author of the smdy concludes that the levels of these compounds found in foods are below the thresholds of carcinogenic concern, no consideration was given to the effects of mixtures, which have been shown to indnce effects at lower concentration than individnal compoimds [50,67]. 

Chiral 2-substituted benzaldehyde chromium tricarbonyl complexes have been reacted with chloroacetophenone in the presence of KO-fert-Bu [544], After decomplexation, the E-epoxyketone is obtained with a high selectivity (Figure 6.88). This Darzens reaction with ClCF COO-tert-Bu is poorly stereoselective. Condensation of the same aldehydes with methyl aaylate or acrylonitrile in the presence of DABCO, followed by decomplexation, also leads highly selectively to P-hydroxyesters or -nitriles 6.105 (Y = COOMe or CN) [547] (Figure 6.88). An anti aldol product is also obtained with a high selectivity from a chromium complex and the titanium enolate of PhCF OCF COS-tert-Bu at -78°C [1281, 1282], Chiral aminals of a-ketoaldehydes react with lithium or sodium enolates of ethyl acetate. After treatment with acid, compounds 6.106 are obtained with a high enantiomeric excess (Figure 6.88). 

In this study, the specific polymers of interest are poly(2,2,2-tri iuoroethyl methacrylate), PTFEMA, poly(2,2,2-trifluoroethyl acrylate), PTFEA, and poly(hexa-fluoroisopropyl aaylate), PHFiPA, with the respective non-fiuorinated counterparts, poly(ethyl methacrylate), PEMA, poly(ethyl acrylate), PEA, and poly(isopropyl acrylate), PiPA. 

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