By Levashova, Gennady Zaikov
The e-book as a rule exhibits the interrelation among allyl unit constitution of the preliminary ester and composition and constitution of its items. the 1st half stories the pathways of chemical regrouping in chlorallylaryl and bisarylallyl esters utilizing quantum-chemical calculations. power parameters, structural good points and electron constitution of intermediates and transition states also are mentioned. uncomplicated and regioselective tools for compound synthesis inaccessible in different construction thoughts are built. For the 1st time, new 4- and eight-term nitrogen-containing heterocyclic compounds have been produced via aniline alkenylation procedure. In 0.05% aqueous resolution those compounds displayed a hundred% task in suppression of sulfate-reducing bacterium development. new sessions of advanced motion arrangements designed for the oil creation cost elevate have been acquired via heterocyclic amine alkenylation. creation equipment for N-alkenyl ammonium salts derived from hexamethylene tetramine are constructed and brought into construction, and compounds are used on oil fields. within the moment half construction equipment of recent mono-, di-, tri- and tetra-tert-butyl hexamethylene tetramine chlorides are mentioned. those compounds totally suppress sulfate-reducing bacterium progress already in two hundred – 500 mg/l focus. A common expertise deriving bactericides and sulfide corrosion inhibitors for metals from methallyl chloride is built. It additionally provides a style for organochlorine waste and methallyl chloride creation wastewater administration, secure for the surroundings.
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Extra resources for Transformations of allyl-substituted and aryl-allyl esters and their corresponding amines
Sample text
The reaction mixture consisted of mono- and dialkenyl phenols. The reaction performed with addition of an allied nucleophile synthesized products of its alkenylation. As a consequence, donor substituent (OCH3) location in the aromatic ring under thermal conditions affects the direction of thermal rearrangement of alkenyl aryl esters and, thus, changes it from intramolecular to intermolecular mechanism. In the presence of ZnCb metoxyphenol a,r-dimethyl allyl esters are rearranged in accordance with the intermolecular mechanism.
21 The studies of thermal rearrangements [93] of 6,8-diacetyl-5-hydroxy2,2-dimethylchroman allyl, prenyl and propargyl esters indicate the Claisen mechanism of the process for allyl esters with formation of a mixture of products: 32 Vera I. Levashova and Gennady E. Zaikov where Ac = -COCH3. 22 Under analogous conditions, corresponded prenyl and propargyl esters are decomposed without any trace ofrearrangement product formation [93]. The rearrangement of aryl propargyl ester in the presence of CsF synthesizes 2-methylarylfuran exclusively, from which salicic aldehyde is simply derived [94].
Levashova and Gennady E. Zaikov 36 ¢ HN~ NH2 + I (C2HshN/CuCL'Cu 25 c 2 h, Cl 0 y Lhl ... ""''"'' H2/hexane ¢ R R R l'>