Acetaldehyde dichloro

Benzophenone, directed reaction with acetaldehyde, 50, 68 1,4-Benzoquinone, 2,3-dichloro-5,6-dicyano-, (DDQ), aroma-tization with, 54, 14 Benzoylacetone, from acetophenone and acetic anhydride,... 

Two isomers are described in the literature 2-Methyl-l,2,3-propanetriol or f3-Methylgylcerol, CH2(OH).C(CH3XOH).CH2.OH, col vis liq, bp 115-20° at 1.6mm. d 1.186 at 20°, nD 1.4730 at 20°, can best be prepd by hydration of /S-methyl-glycidol(2,3-epoxy- 2-metiiyl-l-propanol), and can be prepd directly from either dichloro-tert-butyl alcohol or /3-methylglycerol monochlorohydrin(Ref 2). See also Refs 1,4 5) and 2-(Hydroxymetby[)-l,3-propanediol or Trimethylol Methane, CH2(OH).CH(CH2OH)2 was prepd by Fujii(Ref 3) from a mixt of acetaldehyde formaldehyde(10 25 mol) heated with Ca(OH)2 and the product reduced with H in the presence of Ni... 

The cr-dimethylacetal complex (40) is then hydrolyzed on passage through an alumina column, producing the cr-acetaldehyde complex (38) which is converted to the 7r-vinyl alcohol complex (39) by protonation. Wakatsuki, Nojakura, and Murahashi reported the synthesis of l,3-bis(7r-ethenol)2,4-dichloro- i-dichloroplatinum(II) (41) (42), however, Thyret, who recently reported the NMR evidence for the formation of tetracarbonyl(7r-ethenol)iron (42) at low temperature, could not reproduce the synthesis of (41) (43). 

The dependence of the rate upon the inverse of the hydrogen ion concentration (base-catalysis) is reasonably attributed to the necessity for the coordinated water molecule to lose a proton. The resulting ethyl-ene-hydroxypalladium species (the cis isomer), I, is then believed to undergo an internal addition reaction of the hydroxyl group to the coordinated ethylene to form the dichloro-2-hydroxyethylpalladium anion, II. The final step is a decomposition of the last compound into acetaldehyde, palladium metal, hydrogen ion and chloride anions. 

Dialkylzinc initiates homo- and copolymerization of aldehydes such as acetaldehyde 151, 234, 310, 487, 533), formaldehyde 310, 495), butyraldehyde 468), glutardehyde 386), cyanopropionaldehyde 479), chloroacetaldehyde 233, 234, 324, 325, 412, 495, 533), and dichloro-acetaldehyde 325). Aluminum triisopropoxide 485) and phosphorus compounds 339) were proposed as additives for the polymerizations. Polymerization of optically active aldehydes was also reported ). 

Because the exploitation of the chemistry of unprotected phosphonylated acetaldehydes is handicapped by the sensitivity of the P-C bond in acidic media, a reliable alternative procedure for the preparation of dialkyl 1-chloro-1-formylmethylphosphonates from dialkyl 2-ethoxy-vinylphosphonates has been developed. Room-temperatme chlorination of 2-ethoxyvinylphosphonates with dry chlorine in CCI4 followed by hydrolysis of the phosphonylated a,p-dichloro ethers with water at 50-60°C gives the expected monochlorinated aldehydes in 73-82% yields (Scheme 5.70). A similar treatment with bromine in water at 0°C converts diisopropyl 2-ethoxyvinylphosphonate smoothly into diisopropyl 1-bromo-1-formylmethylphosphonate in 92% yield. ... 

Dichloro-1,2-naphthoquinone 4-Cyano-l,2-naphthoquinone Anisaldehyde 145> Acetaldehyde 8>144>, propionaldehyde 144), anisaldehyde 144>, />-nitrobenzaldehyde 144>, cinnamaldehyde 144>... 

ESTANO (Spanish) (7440-31-5) Finely divided material is combustible and forms explosive mixture with air. Contact with moisture in air forms tin dioxide. Violent reaction with strong acids, strong oxidizers, ammonium perchlorate, ammonium nitrate, bis-o-azido benzoyl peroxide, bromates, bromine, bromine pentafluoride, bromine trifluoride, bromine azide, cadmium, carbon tetrachloride, chlorine, chlorine monofluoride, chlorine nitrate, chlorine pentafluoride, chlorites, copper(II) nitrate, fluorine, hydriodic acid, dimethylarsinic acid, ni-trosyl fluoride, oxygen difluoride, perchlorates, perchloroethylene, potassium dioxide, phosphorus pentoxide, sulfur, sulfur dichloride. Reacts with alkalis, forming flammable hydrogen gas. Incompatible with arsenic compounds, azochloramide, benzene diazonium-4-sulfonate, benzyl chloride, chloric acid, cobalt chloride, copper oxide, 3,3 -dichloro-4,4 -diamin-odiphenylmethane, hexafluorobenzene, hydrazinium nitrate, glicidol, iodine heptafluoride, iodine monochloride, iodine pentafluoride, lead monoxide, mercuric oxide, nitryl fluoride, peroxyformic acid, phosphorus, phosphorus trichloride, tellurium, turpentine, sodium acetylide, sodium peroxide, titanium dioxide. Contact with acetaldehyde may cause polymerization. May form explosive compounds with hexachloroethane, pentachloroethane, picric acid, potassium iodate, potassium peroxide, 2,4,6-trinitrobenzene-1,3,5-triol. 

No account was taken of the reaction field of the solvents and therefore the conclusions drawn can be regarded as correct only if the chemical shift change is in excess of that which would be expected from the reaction field of the solvent in going from a solvent of low dielectric constant (n-pentane) to one of high dielectric constant (dimethyl sulphoxide). A determination of the reaction field-induced shift for the protons of methylene chloride (as a model compound for dichloro-acetaldehyde) supports the conclusions regarding the anisotropy of the carbonyl group. 

Reductive alkylation. In a synthesis of mew-chimonanthine and me o-ealycanthine, two acetaldehyde chains in the masked form are introduced as a ( 2I-2-buten-l,4-diyl unit by reductive alkylation of A. lV -dibenzylisoindigo with fZ)-l,4-dichloro-2-butene. The reaction is mediated by Sml -LiCl. 

Indoleacetic acid (16) is inactivated by plant systems. The effect is probably a resultant of the relative rate of formation, competition with similar compounds for the site of action, and its destruction. The structural similarity to coumarin may show a competition, but there are also indications that coumarin inhibits indoleacetic acid oxidase, which converts the inactive indolyl-3-acetaldehyde to the acid [114-116]. Some coumarin derivatives, like/ -coumaric (17), dichloro-p-coumaric (18), and ferulic acids (19) also affect indoleacetic acid oxidase [117,118]. 

High conversions of cyclopentene were obtained by Nuetzel et al. [59] with hydroperoxides, inorganic peroxides, or aromatic nitroderivatives. To increase the stability of some tungsten-based catalytic systems, Witte et al. [63] employed a-halogenated alcohols such as chloroethanol, 2-chlorocyclohexanol, bro-moethanol, l,3-dichloro-2-isopropanol, o-chlorophe-nol, and 2-iodocyclohexanol. It was observed that methyl and ethyl acetals of formaldehyde, acetaldehyde, chloroform, and benzaldehyde impart good staiblity to the binary systems of tungsten, whereas epoxides such as ethylene oxide and butylene oxide lead at the same time to an increase in activity and stability. 

Theoretical study of cycloadditions of formaldehyde with cyclopropyhdene, dimethyl-silylene carbene, and dichloro-germylene carbene has been conducted at MP2/6-311-t-G and MP2/6-31G levels of theory two competitive dominant pathways have been identified in each case. Likewise four competitive dominant pathways have been found for reaction of dichlorogermylene silylene and acetaldehyde. ... 

R,R)-( )-l,2-difluoro-l,2-dichloroethane l,2-dichloro-l,2-difluoro-ethane chloroacetyl chloride dichloro-acetaldehyde chlorocarbonic acid chloromethyl ester ... 

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