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Ionic Polymerization of Oxygencontaining Bicyclic, Spirocyclic, and Related Expandable Monomers
Published in Rajender K. Sadhir, Russell M. Luck, Expanding Monomers, 2020
Takata Toshikazu, Endo Takeshi
On the basis of these factors, presumably for controlling the polymerization behavior, new five-membered SOCs were synthesized.78,81 Diphenyl derivative 111 completely eliminated phenylethylene carbonate (styrene carbonate) in the reaction with BF3OEt2 (2 mol%) at room temperature for 3 h. The polymer obtained was only poly(phenylacetaldehyde) (113), and was probably formed from phenylacetaldehyde derived by the acid-catalyzed decomposition of 111 (Scheme 51). ()
Reactions With Disinfectants
Published in Richard A. Larson, Eric J. Weber, Reaction Mechanisms in Environmental Organic Chemistry, 2018
Richard A. Larson, Eric J. Weber
N-Chlorocompounds are themselves capable of reacting with some organic compounds to produce oxidation or chlorination products. 4-N-Chlorocytosine (47), for example, reacts with phenylalanine to give a low yield of phenylacetaldehyde (Patton et al., 1972). Presumably, the N-chloro amino acid is formed as an intermediate by direct chlorine atom transfer between 47 and phenylalanine. ()
Development of Green Vapor Phase Corrosion Inhibitors
Published in Hatem M.A. Amin, Ahmed Galal, Corrosion Protection of Metals and Alloys Using Graphene and Biopolymer Based Nanocomposites, 2021
Victoriya Vorobyova, Olena Chygyrynets, Margarita Skiba
From Table 5, EHOMO shows almost no difference between hexanal and 2-phenylacetaldehyde. On the other hand, ELUMO obeys the order: hexanal < 2-phenylacetaldehyde, which is in complete agreement with the inhibition efficiency order of 2-phenylacetaldehyde > hexanal.
Effects of hot air and radiofrequency multi-stage drying for native potato flour processing: Functional and chemical characteristics
Published in Drying Technology, 2023
Xiaopan Sheng, Lan Yang, Yi Sun, Xin Feng, Fuhuan Yuan, Yuhao Zhang, Hankun Zhu
For all the samples, aldehyde volatile compounds had the highest level, among which benzaldehyde, phenylacetaldehyde, decanal, 2,4-Nonadienal, and trans-2- Nonenal had a relatively higher proportion of volatile compounds. Branched chain aldehydes (including phenylacetaldehyde) might come from amino acid degradation, such as non-enzymatic processes. Mo et al.[29] believed that benzaldehyde came from the decomposition of amino acids, and the enzymatic hydrolysis of phenylalanine yields the product of phenylacetaldehyde. In addition, the content of phenylacetaldehyde increased with the increase of drying temperatures, and the highest value could be found in the 90 °C samples. Nakamura et al.[30] mentioned that potato odor compounds furans were produced from the Maillard reaction. The highest content of 2-Pentylfuran was in the 90 °C AD sample, which indicated that the Maillard reaction was promoted during the high-temperature treatment. For alcohols, 1-Octen-3-ol, 2-ethyl-4-methylpentanol and trans-2-undecenol had the richest content. During the drying process, starch decomposed into monosaccharides, alcohol compounds, and CO2. The content of alcohol volatile compounds in the 90 °C AD sample was lower than that of the other samples, which might be related to high-temperature treatment causing a higher volatilization rate.
Synthesis, characterization and X-ray crystal structures of oxidovanadium(V) and dioxidomolybdenum(VI) complexes derived from 2-bromo-N'-(3,5-dichloro-2-hydroxybenzylidene)benzohydrazide
Published in Journal of Coordination Chemistry, 2022
Yan Lei, Qiwen Yang, Yang Bai, Yao Tan
Epoxidation of styrene was carried out at room temperature with the complexes as the catalysts and PhIO and NaOCl as oxidants. Because of the insolubility of iodosylarenes in common organic solvents, we did not attempt to determine the rate law [61, 62]. The percentage of conversion of styrene, selectivity for styrene oxide, yield of styrene oxide and reaction time to obtain maximum yield using both the oxidants are given in Table 5. The data reveals that the complexes as catalysts convert styrene very efficiently in the presence of both oxidants. Nevertheless, the catalysts are selective towards the formation of styrene epoxides despite the formation of by-products which have been identified by GC–MS as benzaldehyde, phenylacetaldehyde, styrene epoxides derivative, alcohols, etc. From the data it is also clear that the complexes exhibit excellent efficiency for styrene epoxide yield. When the reactions were carried out with PhIO and NaOCl, styrene conversions of 1 and 2 were 83% and 76%, and 92% and 87%, respectively. It is evident that between PhIO and NaOCl, the former acts as a better oxidant with respect to both styrene conversion and styrene epoxide selectivity. The epoxide yields for 1 and 2 using PhIO and NaOCl as oxidants are 75% and 72%, and 87% and 83%, respectively. Obviously, dioxidomolybdenum complex 2 has better catalytic activity than oxidovanadium complex 1. No oxidized products were observed when blank reactions were carried out without catalyst.
Aromatic hydrocarbon compound degradation of phenylacetic acid by indigenous bacterial Sphingopyxis isolated from Lake Taihu
Published in Journal of Toxicology and Environmental Health, Part A, 2019
Feiyu Huang, Xiaoyu Li, Jian Guo, Hai Feng, Fei Yang
Various aromatic compounds, including styrene, trans-styrylacetic acid, 2-phenylethylamine, phenylacetaldehyde, and several phenylalkanoic acids are known to generate PAA through catabolic reactions (Fernández, Díaz, and García 2014; Luengo, Garcia, and Olivera 2001). Further, several bacteria and fungi utilize these aromatic acids as sole carbon source, either during aerobic or anaerobic (Mohamed et al. 2002). Oelschlagel et al. (2015a) found that Sphingopyxis sp. Kp5.2T isolated from soil degraded styrene to the metabolic intermediate PAA. Subsequently, Oelschlagel et al. (2015b) demonstrated that the soil bacterium degraded PAA. In agreement with this finding, Sphingopyxis strain isolated from surface water of Lake Taihu was also to degrade PAA. At low 20°C temperatures Sphingopyxis sp. YF1 is more effective in degrading PAA at alkaline condition. At high temperatures, 40°C a more favorable acidic condition for PAA degradation by Sphingopyxis sp. YF1was noted. Under constant temperature and pH, the concentration of PAA was a factor in the degradation process. Evidence thus indicated that PAA degradation efficiency of Sphingopyxis sp. YF1 was affected by concentration of PAA, pH, and temperature.