107-20-0Relevant articles and documents
The reactions of atomic chlorine with acrolein, methacrolein and methyl vinyl ketone
Wayne,Canosa-Mas,Cotter,Duffy,Thompson
, p. 3075 - 3084 (2001)
The rate constants and the products of the reactions between atomic chlorine and acrolein, methachlorine, and methyl vinyl ketone were determined. Rate coefficients for the reactions of chlorine with acrolein and with methyl vinyl ketone were slightly dependent at 1.6 and 760 torr, although the rate coefficients at 1.6 torr were a factor of only ～ 2 smaller than the values obtained at 1 atm. The reaction between Cl atoms and methacrolein in synthetic air and 1 atm yielded chloroacetone, formaldehyde, CO, and HCl. Between Cl atoms and acrolein, the products of reaction were HCl, chloroacetaldehyde, formaldehyde, and CO. For the reaction between Cl atoms and methyl vinyl ketone, the products were chloroacetaldehyde, formaldehyde, and CO. Branching ratios for abstraction (the fraction of reactions occurring by abstraction relative to the sum of addition and abstraction processes) were 0.22 for acrolein, 0.18 for methacrolein, and 0.03 for methyl vinyl ketone. Vast quantities of isoprene were converted to methacrolein in the atmosphere, and several channels of oxidation following attack by chlorine on methacrolein led to CO formation, with an overall yield of ～ 0.75.
Photooxidation of exhaust pollutants: III. Photooxidation of the chloroethenes: Degradation efficiencies, quantum yields and products
Guertler,Moeller,Sommer,Mueller,Kleinermanns
, p. 1671 - 1682 (1994)
The photochemical decomposition and oxidation of the chloroethenes C2H4-XClX (x=1-4) was investigated in the gas phase by irradiation with a low pressure mercury lamp in an oxygen atmosphere. Degradation efficiencies directly depend on the number of chlorine atoms both at 185 and 254 nm. The quantum yields for degradation increase from 2-3 for vinyl chloride to > 100 for tri- and tetrachloroethene at 185 nm in the 10-3 bar concentration range. At 254 nm we measured nearly time independent quantum yields of around 10 for tri- and 40 for tetrachloroethene. The photooxidation products and their mechanism of formation are discussed in detail.
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Berthelot,Jungfleisch
, (1868)
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Preparation, Titration, and Storage of Chloroacetaldehyde for Fluorimetric Determination of Adenine and Its Derivatives
McCann, William P.,Hall, Leo M.,Nonidez, William K.
, p. 1454 - 1455 (1983)
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One-pot Preparation of 2-Chloromethyldioxolanes and 2-Aminothiazoles from Chloromethyltrioxanes
Wakasugi, Takashi,Miyakawa, Tadashi,Suzuki, Fukuichi,Itsuno, Shinichi,Ito, Koichi
, p. 2039 - 2042 (1994)
Thermal degradation of chloromethyltrioxanes in the presence of catalytic amount of montmorillonite clay generated α-chloroaldehydes with high purity, which were treated in situ with ethylene glycol or thiourea to afford 2-chloromethyldioxolanes and 2-aminothiazoles, respectively.The clay catalysts used were removed by filtration.
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Frechet,Schuerch
, p. 492,495 (1971)
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Preparation of Chloroacetaldehyde Cyclic Trimer and Its Depolymerization
Wakasugi, Takashi,Tonouchi, Naka,Miyakawa, Tadashi,Ishizuka, Makoto,Yamauchi, Takashi,et al.
, p. 171 - 172 (1992)
Chlorination of paraldehyde gave chloroacetaldehydes which were treated with concd sulfuric acid to afford cyclic trimer (3) of chloroacetaldehyde (CA).Depolymerization of 3 yielded pure CA satisfactory.
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Greenfield et al.
, p. 545,546,547 (1976)
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Harvey,Damle.
, p. 341,342, 343 (1972)
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Akhmetov,M.Kh. et al.
, (1970)
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On five- vs six-membered diacetal formation from threitol and the intermediacy of unusually stable protonated species
Grabarnik, Mikhail,Lemcoff, N. Gabriel,Madar, Ravit,Abramson, Sarah,Weinman, Sarah,Fuchs, Benzion
, p. 1636 - 1642 (2000)
The long known, but hitherto poorly understood, thermodynamically controlled diacetalation of rac-threitol with alkylaldehydes provided bicyclic, cis-tetraoxadecalin (TOD) ('66') and bi(dioxolanyl) (BDO) ('55') products, shown to be formed in acid-concentration and temperature-dependent ratio. The configurational and conformational isomeric diacetals obtained in four such reactions of substituted aldehydes (RCHO, R = CH3, CH2Cl, CH2Br, CO2CH3) with rac-threitol were isolated and characterized. A variable acid- concentration analysis of the equilibrium mixture of products in one such case (R = CH2Br) was performed and provided equilibrium constants and, hence, free-energy differences among these products and their relatively stable protonated intermediates. The latter were rationalized by the unusually high proton-affinity calculated for the cis-TOD ('66') form.
Selective reduction with lithium bis- Or tris(dialkylamino)aluminum hydrides. III. Reduction of primary carboxamides to aldehydes by lithium tris(diethylamino)aluminum hydride
Cha, Jin Soon,Lee, Jae Cheol,Lee, Heung Soo,Lee, Sung Eun,Kim, Jong Mi,Kwon, Oh Oun,Min, Soo Jin
, p. 6903 - 6904 (1991)
Both aliphatic and aromatic primary carboxamides are reduced readily to the corresponding aldehydes by lithium tris(diethylamino)aluminum hydride in THF at room temperature in yields of 50-90%.
Continuous preparation method for 2-aminopyrrolyl-3-ethyl carboxylate
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Paragraph 0039-0041; 0048-0050; 0057-0059; 0066-0068; 0075, (2020/01/12)
The invention provides a continuous preparation method for 2-aminopyrrolyl-3-ethyl carboxylate. The preparation method comprises the steps: continuously feeding a trichloroacetaldehyde solution to a first continuous reactor to carry out continuous acid catalyzed depolymerization on trichloroacetaldehyde, so as to a chloroacetaldehyde solution; and continuously feeding a 3-amino-3-imidoethyl propionate solution, an alkali solution and the chloroacetaldehyde solution to a second continuous reactor for a condensation reaction, thereby obtaining the 2-aminopyrrolyl-3-ethyl carboxylate. According to the continuous process, the restriction to anhydrous chloroacetaldehyde is broken through, the anhydrous chloroacetaldehyde is prepared by a continuous reaction, the reaction speed is higher than that of batches, and the yield is higher; and when the prepared chloroacetaldehyde solution is directly applied to the condensation reaction of next step, the material proportioning ratio is more controllable, the front and rear two steps can be compatible, and thus, the yield of the 2-aminopyrrolyl-3-ethyl carboxylate is globally increased. In addition, due to the continuous process, a scaling effect of the batches is avoided, and high yield during industrial application is also guaranteed.
Rearrangement Reaction Based on the Structure of N-Fluoro- N-alkyl Benzenesulfonamide
Wang, Han-Ying,Pu, Xiao-Qiu,Yang, Xian-Jin
, p. 13103 - 13110 (2018/10/20)
A novel rearrangement reaction based on the structure of N-fluoro-N-alkyl benzenesulfonamide was developed. The reaction proceeded readily at 50 °C in formic acid and generated a variety of benzenesulfonamides and aldehydes or ketones simultaneously. The reaction mechanism is believed to be a concerted mechanism that consist of 1,2-aryl migration with the departure of fluorine anion via an SN2 mechanism. This rearrangement reaction features an interesting reaction mechanism, mild reaction conditions, simple operations, and a broad substrate scope.
