Ethylene derivatives oxidative

Oxidations with phosphatoplumbic acid Aldehydes from ethylene derivatives Oxidative cleavage... 

Palladous chloride j cupric chloride j sodium chloride p-Acoxycarboxylic acid anhydrides from ethylene derivs. Oxidative carbonylation... 

In Robinson s now well-known suggestions, regarding the processes by which alkaloids may be produced in plants, two main reactions are used j the aldol condensation and the similar condensation of carbinol-amines, resulting from the combination of an aldehyde or ketone with ammonia or an amine, and containing the group. C(OH). N., with substances in which the group, CH. CO. is present. By these reactions it is possible to form the alkaloid skeleton, and the further necessary changes postulated include oxidations or reductions and elimination of water for the formation of an aromatic nucleus or of an ethylene derivative. 

Like other 2,2-diaryltrichloroethanes, DFDT undergoes dehydrohalogenation in the presence of a base to yield l,l-dichloro-2,2-bis(p-fluorophenyl)-ethylene. The rate of this reaction has been found to be directly proportional to the temperature, and the rate constant for DFDT is approximately one seventh that for DDT at ordinary temperatures (18, 110). This ethylene derivative has been oxidized by the use of chromic anhydride to p,p -difluorobenzophenone, a sample of which did not depress the melting point of an authentic sample prepared by a different route (10). 

The photochemical conversion of ( )-l-(3-indolyl)-2-(pyridyl)ethylenes into their Z isomers is followed by photocyclization. Single products are obtained from the 2- and 4-pyridyl compounds, but the two expected isomeric products are obtained from the 3-pyridyl derivatives. Oxidation of the cyclized products yields the fully aromatized systems (75JHC455, 80T1209). 

Tab. 3.1 Regioselectivity for the Hydration (via Hydroboration/Oxidation/Hydrolysis) of Ethylene Derivatives that Contain More Alkyl Substituents at Than at Ca...

Prevost, C. lodo-silver benzoate and its use in the oxidation of ethylene derivatives into a-glycols. Compt. rend. 1933,196, 1129-1131. 

Derivation Oxidation of diammonium ethylene bis-dithiocarbamate with calcium hypochlorite. 

A soln. of l-methyl-l,2-cyclohexanediol in acetone treated at ca. 0 with 1-2 gin. portions of KMn04 - 6-ketoheptanoic acid. Y 84% based on reacted starting material.—In general, better yields from, ethylene derivatives were obtained by first preparing and then oxidizing the corresponding glycols. (F. e. s. H. Adkins, A. K. Roebuck, Am. Soc. 70, 4041 (1948).)... 

Triphenylphosphinelethylene oxide Ethylene derivatives from halides and 0x0 compounds Shortened Wittig synthesis... 

Carbon tetrabromide Oxidative dimerization of electron-ridi ethylene derivs. 

Alkene oxides s. Oxido compds. Alkenes s. Ethylene derivs. Alkoxides s. Alkali alkoxides Alkoximes... 

Peroxydicarbonates s. Diisopropyl peroxydicarbonate Peroxydisnlfate s. Persulfate Peroxymaldc acid 26,136 Peroxymercuration of ethylene derivs. 26, 637 Persolfate 26,137 Peroxytrifluoroacetic acid as reagent 26, 137, 529 —/boron fluoride, oxidations with -, review 19, 161 suppl. 26 pH s. Buffer solns. 

Silver oxide Hofmann degradation of quaternary ammonium salts Ethylene derivs. from tert. amines... 

Calcium oxide/sodium hydroxide Ethylene derivatives from sulfonates Carbohydrates... 

Ozone dimethyl sulfide Aldehydes from ethylene derivatives hy oxidative cleavage... 

Potassium hexacyanoferrate(III) oxygen Oxidative dimerization to ethylene derivatives with decarboxylation... 

Even a small content of oxides (<1 %) in the electrolyte results in formation of carbon mono- and dioxide as main anode products. After the oxide ions are worked out, the anode gas consists of chlorofluorocarbons of methane series (CF4, CF3CI and CF2CI2) with small admixtures of ethane and ethylene derivatives. The evolution of chlorine gas was not observed in a wide range of melt composition and other experimental conditions. Presumably, the current densities required for the chlorine evolution are higher than the critical values for the onset of the anode effect and, thus, cannot be attained. 

Glycolic acid is an alpha-hydroxy acid, soluble in alcohol, derived from fruit and milk sugars. It can be produced with ethylene glycol-oxidizing microorganisms such as Pichia naganishii AKU 4267 and Rhodotorula sp. 3 Pr-126. Under optimized conditions, they form... 

A short synthesis of ( )-isostegane, a tetracyclic dibenzocycloota-diene lactone, has been achieved by a sequential double a, -substitution of an electron-deficient ethylene derivative, in this case zl P-butenolide, followed by non-phenolic oxidative coupling with VOFg . An equally short synthesis of methyl jasmonate has been achieved through 1,4-addition-alkylation of cyclopentenone . 

Electrochemical oxidation of N-subst. carboxylic acid amides 5,6-Dihydro-l,3-oxazinium salts from ethylene derivs. 

Ozone dimethyl sulfide Oxidative ring opening Diacetals from cyclic ethylene derivs. 

A suspension of KBr in methylene chloride containing a little 18-crown-6 polyether stirred vigorously for 15 min, cooled to 0°, cyclopentene added, the mixture treated dropwise with m-chloroperoxybenzoic acid over 5 min, and stirring continued for 15 min - trans-pvodwci. Y 85%. Addition to unsym. ethylene derivs. is regiospecific. F.e. and oxidants s. M. Srebnik, Synth. Commun. 19, 197-205 (1989). 

Pyrrolidines from ethylene derivs. and amine oxides O... 

Isothiazolidine 1-oxides from a-aminocarboxylic acids and ethylene derivs. via 1,3-dipolar cycloaddition... 

Alkali met hydrides, superactive -, reactions with - 43, 34 Alkali metal selenides -, in s/tu-preparation 43, 529 Alkene oxides s. Oxido compds. Alkenes s. Ethylene derivs. 

Carbonylation, oxidative -, P-acoxycarboxylic acid anhydrides from ethylene derivs. 44, 640 Carbonylation, phase transfer catalyzed 44, 807... 

---