Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Emmert reaction

Beyer synthesis, 2, 474 electrolytic oxidation, 2, 325 7r-electron density calculations, 2, 316 1-electron reduction, 2, 282, 283 electrophilic halogenation, 2, 49 electrophilic substitution, 2, 49 Emmert reaction, 2, 276 food preservative, 1,411 free radical acylation, 2, 298 free radical alkylation, 2, 45, 295 free radical amidation, 2, 299 free radical arylation, 2, 295 Friedel-Crafts reactions, 2, 208 Friedlander synthesis, 2, 70, 443 fluorination, 2, 199 halogenation, 2, 40 hydrogenation, 2, 45, 284-285, 327 hydrogen-deuterium exchange, 2, 196, 286 hydroxylation, 2, 325 iodination, 2, 202, 320 ionization constants, 2, 172 IR spectra, 2, 18 lithiation, 2, 267... [Pg.831]

A single one-electron wave was found in strong acid solution, but in weaker acid or alkaline solution two one-electron waves were observed (Scheme 186). Pyridine and acetone undergo Emmert reaction and further reduction on electrolysis in dilute sulfuric acid using lead electrodes (equation 160) (69CCC2108). [Pg.284]

Preparation of secondary (or tertiary) carbinols from pyridines and an aldehyde (or a ketone) in the presence of magnesium or aluminum and mercuric chloride is known in pyridine chemistry as the Emmert reaction. 7 70 For example, dimethyl-2-pyridylcarbinol is obtained in this way from pyridine and acetone. When a mixture of pyridine and acetone is subjected to an electrolytic reduction in dilute sulfuric acid at lead electrodes, a mixture of two main products results, namely, 2-(2-hydroxy-2-propyl)-3-piperideine and 4-(2-hydroxy-2-propyl)piperidine. Analogous compounds are obtained with the use of methyl ethyl ketone as the reactant. The mixed electrolytic reduction of 2-methylpyridine and acetone affords 2-(2-hydroxy-2-propyl)-6-methyl-3-piper ideine (74) and 2-methyl-4-(2-hydroxy-2-propyl)-piperidine.71... [Pg.67]

Emmert reaction. Formation of 2-pyridyldial-kylcarbinols by condensation of ketones with pyridine or its homologs in the presence of aluminum or magnesium amalgam. [Pg.498]

Other references related to the Emmert reaction are cited in the literature. ... [Pg.996]

Elbs Persulfate Oxidation Elbs Reaction Emde Degradation Emmert Reaction... [Pg.5]

Emmert reaction reaccion de Emmert emodin emodina emollient emoliente emorfazone emorfazona emphasize, to destacar, recalcar, puntualizar empirical empirico... [Pg.111]

See other pages where Emmert reaction is mentioned: [Pg.510]    [Pg.680]    [Pg.788]    [Pg.790]    [Pg.166]    [Pg.276]    [Pg.277]    [Pg.510]    [Pg.621]    [Pg.680]    [Pg.788]    [Pg.790]    [Pg.831]    [Pg.301]    [Pg.302]    [Pg.166]    [Pg.276]    [Pg.277]    [Pg.621]    [Pg.680]    [Pg.788]    [Pg.790]    [Pg.831]    [Pg.510]    [Pg.621]    [Pg.680]    [Pg.788]    [Pg.790]    [Pg.205]    [Pg.993]    [Pg.993]    [Pg.994]    [Pg.246]    [Pg.246]   
See also in sourсe #XX -- [ Pg.300 ]



SEARCH



© 2024 chempedia.info