Interphase catalyst

Applications of sol-gel-processed interphase catalysts. Chemical Reviews, 102, 3543-3578. Pierre, A.C. (2004) The sol-gel encapsulation of enzymes. Biocatalysis and Biotransformation, 22, 145-170. Shchipunov, Yu.A. (2003) Sol-gel derived biomaterials of silica and carrageenans. Journal of Colloid and Interface Science, 268, 68-76. Shchipunov Yu.A. and Karpenko T.Yu. (2004) Hybrid polysaccharide-silica nanocomposites prepared by the sol-gel technique. Langmuir, 20, 3882-3887. 

Another modern modification involves coupling of UNs 30 and /1-ketoesters 36 in aqueous emulsion in the presence of an interphase catalyst triethylbenzylammonium chloride (TEBAC) (06JCM228). 

Oxidation of 2,3-dihydrobenzodiazepines by various oxidants (H202, Se02, peracids, etc.) normally gives resinous reaction products which cannot be easily identified. However, described in [107] is the oxidation of 7V-bezoyl derivatives of benzodiazepines 97 by meta-chloroperbenzoic acid in the presence of sodium bicarbonate and triethylbenzyl ammonium chloride (used as an interphase catalyst) which yields compounds 98 (Scheme 4.32). 

The well-known synthetic procedures for crown ethers and their analogs allowed one to synthesize clathrochelates with dioximate fragments of the 0x0- and thioether crown type (Scheme 13). The interaction of phenylboronic and re-butylboronic precursors with 3 mols of the sodium salt of bis-(2-(o-oxyphenoxy))diethyl ether for 5 h in THF at 50-60° led largely to the formation of Ca-nonsymmetric tworibbed-substituted products (Scheme 13). The reactions of n-butylboronic precursor were studied in more detail. The use of a 30% excess of the sodium salt of bis-(2-(o-oxyphenoxy))diethyl ether and an increase in the reaction time up to 30 h permits one to isolate a tricrown ether clathrochelate (Scheme 13). Tetrabutylammonium salt ((re-C4H9)4N)Cl was used as an interphase catalyst for the... 

Comparing specimens differing in chemical composition, the structure of the composite containing polyisocyanate, sodium waterglass, MGF-9 interphase catalyst, and UP 606/2 polymerization catalyst is identical to that of the composite consisting of polyisocyanate and UP 606/2 only. Similar distribution and size of the structural elements are observed. 

Recoverable Silica-Based Tungstate pu Interphase Catalyst... 

Karimi, B. and Khalkhali, M. 2005. Solid silica-based sulfonic acid as an efficient and recoverable interphase catalyst for selective tetrahydropyranylation of alcohols and phenols. J. Mol. Catal. A Ghent. 232(1-2) 113-117. 

The preparation and characterization of n-propyl sulfamic acid, covalently supported on hydroxyapatite-encapsulated magnetic NPs [y-Fe203-HAp-(CH2)3-NHSO3H], was described [83]. A synthesized material acts as a powerful and green heterogeneous interphase catalyst for the preparation of substituted quinolines and a-aminophosphonates derivatives (Scheme 5.32). Hydroxyapatite is found... 

S hey khan M, Ma mani L, Ebrahimi A, Heydari A (2011) Sul mic acid heteiogenized on hydroxyapatite-encapsulated y-Fe Oj nanoparticles as a magnetic green interphase catalyst. J Mol Catal A Chem 335 253-261... 

Karimi, B., Zamani, A. and Clark, J. (2005). A Bipyridyl Palladium Complex Covalently Anchored onto Silica as an Effective and Recoverable Interphase Catalyst for the Aerobic Oxidation of Alcohols, Organometallics, 24, pp. 4695-4698. 

Low A.A., Lauher J.W. Tetraethylammonium dodecacarbonyltricobaltferrate(l-) and (triphenyl-phosphine)gold(l+) dodecarbonyltricobaltferrate(l-). Inorg. Synth. 1990 27 188-191 Lu Z.-L. Lindner E., Mayer H.A. Applications of sol-gel processed interphase catalysts. Chem. Rev. 

Lu Z-L, Lindner E, Mayer HA (2002) Applications of Sol-Gel-Processed interphase catalysts. Chem Rev 102 3543-3578... 

Compound 15 was obtained by two other authors [29,30] from 2-ethoxycarbonylindole (41) using similar methods. Analogously, 8-disubstituted (59-61) and 3,5,8- trisubstituted (62-81) derivatives (Scheme 5) were synthesized [31]. N-alkylation of compounds 11,56 was processed in interphase catalysts, in the medium of benzene/concentrated NaOH solution in presence of trimethylbenzylammonium chloride. Aminomethylation of pyridazines 15,59-6 is done with the mixture of formalin and corresponding amine in ethanol. Yields in all steps of scheme 5 are high [31]. 

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