Methyl phenyl acrylate

This method of quantum yields calculation was verified in more detail in studying the photorearrangement of 4-methylphenyl benzoate (60) (in ethanol with 253.7 nm).71 The quantum yield of ester decrease, Additional examples are calculations of the photorearrangements of poly-4-benzoyloxystyrene (in dioxane with 253.7 nm) (cpA = 0.082, [Pg.138]

Evans s bis(oxazolinyl)pyridine (pybox) complex 17, which is effective for the Diels-Alder reaction of a-bromoacrolein and methacrolein (Section 2.1), is also a suitable catalyst for the Diels-Alder reaction of acrylate dienophiles [23] (Scheme 1.33). In the presence of 5 mol% of the Cu((l )-pybox)(SbF5)2 catalyst with a benzyl substituent, tert-butyl acrylate reacts with cyclopentadiene to give the adduct in good optical purity (92% ee). Methyl acrylate and phenyl acrylate underwent cycloadditions with lower selectivities. 

In 2000, Morken et al. reported the first examples of catalytic asymmetric reductive aldol reactions [21]. Using Rh(BINAP) (5mol%) as catalyst and Et2MeSiH as reductant, the syn-selective (1.7 1) coupling of benzalde-hyde and methyl acrylate produced the diastereomers 35-syn and 35-anti in 91% ee and 88% ee, respectively. Using phenyl acrylate as the nucleophilic partner, a favorable yield of 72% was obtained for the aldol product 36 (Scheme 12). Several aldehydes were examined, which exhibit higher levels of syn-selectivity. Expanding the scope of substrates and acrylates under... 

Preliminary results from a study of catalytic activation of the heterocoupling between arylhalides and alkenes using pony-tail-functionalized dendrimer-encapsulated Pd nanoparticles have shown promise. For example, the classic Pd-catalyzed Heck coupling between arylhalides and methacrylate yields predominately (> 97%) the trans-cinnimaldehyde product [176]. On the other hand, the C02-soluble dendrimer nanocomposite exclusively catalyzes the production of the highly unfavored 2-phenyl-acrylic acid methyl ester isomer at 5000 psi and 75 °C (Fig. 27] [177]. 

BINAP core-functionalized dendrimers were synthesized by Fan et al. (36), via condensation of Frechet s polybenzyl ether dendritic wedges to 5,5 -diamino-BINAP (26—28). The various generations of BINAP core-functionalized dendrimers were tested in the ruthenium-catalyzed asymmetric hydrogenation of 2-[p-(2-methyl-propyl)phenyl]acrylic acid in the presence of 80 bar H2 pressure and in a 1 1 (v/v) methanol/toluene mixture. As later generations of the in situ prepared cymeneruthe-nium chloride dendritic catalysts were used, higher activities were observed (TOF values were 6.5, 8.3, and 214 h respectively). Relative to those of the BINAP... 

The hyperbaric 4 + 2-cycloaddition of 1,2,4-trioxegenated 1,3-dienes with dieno-philes, A-phenylmaleimide, and methyl and phenyl acrylates produced the expected endo-cycloadducts with excellent stereo- and regio-control.113 The high-pressure (g) Diels-Alder reactions of 3-substituted coumarins with methylbuta-1,3-dienes in water formed tetrahydro-6H-benzo[c]chromen-6-ones in high yields (85-95%).114... 

Similar to the addition to HFIPA, the /MCD-mediated addition of methyl, phenyl, and naphthyl acrylates to N-sulfonyl imines afforded the (S)-adduct, which is opposite to that observed with aldehydes (Table 5.12) [95]. The best conditions were found using either dichloromethane or acetonitrile as solvent. 

The most important monomers (> 95 % by weight) for silicone synthesis are the methyl chlorosilanes. Next to them are the phenyl chlorosilanes, methyl phenyl chlor-osilanes, methyltrifluoropropyl chlorosilanes, and a variety of silanes containing organic functional groups such as hydroxyl, amine, epoxy, acrylate and carboxyl which are responsible for the different products. 

Preparation of cis/trans methyl-l-amino-2-cyclohexylethyl-l-methyl-(3-phenyl acrylic acid)phosphinate (generic procedure)... 

E)-3-Cyclopentyl-2-[3-fluoro-4-(5-methyl-tetrazol-l-yl)-phenyl]-acrylic acid methyl ester... 

Poly(phenyl acrylate) Poly(methyl methacrylate) (atactic) 57 105 — Poly(/>-xylene) 375... 

More detailed investigations on the photoreactive behaviour of polymeric systems based on the benzoin moiety have been described [103]. Indeed, poly (benzoin acrylate) [poly(AB)] and copolymers of benzoin acrylate with styrene or MMA [poly(AB-co-St) and poly(AB-co-MMA), respectively] have been prepared and characterized. Poly(AB), when irradiated by UV light in the presence of photosensitizers such as benzophenone, /r-beiraxpiinone or methyl phenyl ketone, gives a benzene-insoluble crosslinked polymer. 

These radicals are able to initiate the polymerization of acrylates, methacrylates and styrene [129]. In particular, poly(methyl phenyl silylene) [poly(MPSi)] is found to be the most effective, in accordance with a very high quantum yield of silyl radical formation. 

Shi, M., Chen, L.-H. Chiral phosphine Lewis base catalyzed asymmetric aza-Baylis-Hillman reaction of N-sulfonated imines with methyl vinyl ketone and phenyl acrylate. Chem. Commun. 2003,1310-1311. 

Specifically mentioned monomers include methyl acrylate, ethyl acrylate, propyl acrylate (all isomers), butyl acrylates (all isomers), 2-ethylhexyl acrylate, isobornyl acrylate, acrylic acid, benzyl acrylate, phenyl acrylate, acrylonitrile, glycidyl acrylate,... 

Greenhouse evaluation in a random herbicide screen showed that 3-chloro-4-methyl-6-[m-(trifluoro-methyl)phenyl)pyridazine was sufficiently active to serve as a lead for a synthesis project. Related 3-chloropyridazines were prepared by a sequence based on the addition of acyl anion equivalents of substituted benzaldehydes to the appropriately substituted acrylate esters. Using 3-chloro-pyridazines as key intermediates, a variety of other 3-substituted-pyridazines were prepared. The effect of altering substitution at each position of the pyridazine and phenyl rings on herbicidal activity was examined. 

Similar reactions were observed when 1 -phenyldiazoethane was allowed to react with methyl ( )-2-cyano-3-(4-substituted phenyl)acrylates in dichloromethane at — 5 to 0 °C. The expected cyclopropanes, methyl 1 -cyano-3-methyl-3-phenyl-2-(4-substituted phenyl)cyclopropanecarb-oxylates 2, were formed in moderate to low yields. In addition, significant amounts of methyl 2-cyano-4-phenyl-4-(4-substituted phenyl)pent-2-enoates 3, formed by rearrangement from postulated dihydropyrazole intermediates, and methyl 4-cyano-3-methyl-3-phenyl-5-(l-phenyT l-(4-substituted phenyl)ethyl]-4,5-dihydro-3f/-pyrazole-4-carboxylates4, formed by 1-phenyldiazoethane attack on 3, were obtained. ... 

Since the first preparation of stereoregular poly(methyl methacrylate) by Fox et al. and Miller et al. in 1958, a large number of papers have been published on the steieospecific polymerization of methyl methacrylate, while the NMR technique for the determination of microstructure developed by Bovey and Tiers and Nishioka et al. enabled us to accumulate the extensive information on this polymerization. Mostly anionic initiators have been used for the pdymerization. A review on the polymerization by lithium compounds was presented by Bywater In a recent review by Pino and Suter were discussed some of the factors which can influence the stereoregulation in the polymerization of vinyl monomers including a-substituted acrylate. A variety of magnesium and aluminum compounds can be utilized as stereospecific initiators. Besides methyl methacrylate, not only methacrylates with various ester groups, but also a-substituted acrylates, such as a-ethyl- or o-phenyl-acrylate, were also subjected to the stereospecific polymerization by anionic initiator. The stereospecificity in the copolymerization between the monomers described above is also a matter of interest. 

Synonyms 2-(1,1-Dimethylethyl-6-[[3-(1,1-dimethylethyl)-2-hydroxy-5-methylphenyl] methyl-4-methylphenyl acrylate 2-Propanoic acid, 2-(1,1 -dimethylethyl)-6-[[3-(1,1 -dimethylethyl)-2-hydroxy-5-methylphenyl] methyl]-4-methyl phenyl ester Classification Hindered phenolic Uses Antioxidant, stabilizer for food-grade polymers in food-pkg. adhesives Regulatory FDA 21CFR 175.105, 175.125, 178.2010... 

Propenamide-2-propenoic acid polymer. See Acrylic acid/acrylamide copolymer 2-Propenamide, N-[[4-[(4,7,7-trimethyl-3-oxobicyclo [2.2.1] hept-2-ylidene) methyl] phenyl] methyl]-, homopolymer. See Polyacrylamidomethyl benzylidene camphor Propenamidopropyltrimethylammonium chloride, polymer with propenoic acid, butenoic acid, and/or alkyl propenoates. See Acrylamidopropyltrimonium chloride/acrylates copolymer... 

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