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Showing 1 to 11 of 11 for “"reformatsky"”.
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Neue Anwendungen der Chrom-Reformatsky-Reaktion
… und Pilocarpin (58) unter Verwendung der Chrom-Reformatsky-Reaktion. Die Synthesen von 56 und 57 waren erfolgreich, 58 scheiterte am Chrom-Reformatsky- Schritt (Kapitel 4). • Die Untersuchung von Chrom-Reformatsky-Reaktionen festphasengebundener Substrate (Kapitel 5): • Ferner wurde die …
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Intramolecular [4+1] pyrroline annulation as a general method for the synthesis of pyrrolizidine alkaloids
… its regioisomer 2 by utilizing the vinylogous Reformatsky reaction, and the intramolecular additions of the azide moiety across the activated dienes with subsequent pyrolyses to provide the pyrrolizidines of type 3. This study broadened the scope of the vinylogous Reformatsky reaction to …
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Redução química e eletroquímica de α-halo-ésteres e α-halocetonas e seus acoplamentos a compostos carbonílicos
… realizados experimentos estendendo a reação de Reformatsky, especificamente a adição de α-halocetonas, ao formaldeído em meio aquoso que tiveram sucesso no caso da 2-bromoisobutirofenona. Outra linha de pesquisa envolveu a reação de Reformatsky realizada em meio aquoso através de métodos …
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The Synthesis of 5-[(P-Hydroxyphenyl)-2, 4, 6-Tricarbethoxy]-Cyclohexanedione-1, 3.
… can afford alkylation, acylation, Grignard, Reformatsky, halogenation, and many other type reactions.
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Applications of mischmetal in organic synthesis
… water interfered the reaction. Appling MM in the Reformatsky-type reaction with azo-compounds was found that the desired reaction did not occur for any of the studied azo-substrates. Instead of the Reformatsky-type addition product complex mixtures and simple hyrdazines or their silylated forms …
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Nickel-catalyzed reductive coupling reactions of 1,6-enynes and the total synthesis of (+)-acutiphycin
… featuring an intermolecular SmI2-mediated Reformatsky coupling reaction and macrolactonization initiated by a retro-ene reaction of an alkoxyalkyne was developed. The resulting synthesis was 18 steps in the longest linear sequence from either methyl acetoacetate or isobutyraldehyde. ...
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The tandem chain extension -aldol reaction of beta-keto esters
… with significant syn-selectivity. A control Reformatsky reaction with a methyl 2-iodo-5,5-dimethyl-4-oxo-hexanoate 53 and methyl 2-iodo-5,5-dimethylhexanoate 65 indicates that the presence of a gamma-keto-functionality in the zinc-organometallic intermediate in the TCEA reactions is key to …
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Organic Synthesis: Taming Chemistry using Enabling Technologies
… respectively. In addition, a diastereoselective Reformatsky-type carbethoxyallylation using zinc metal was also highlighted in this synthesis to install an important stereocentre. A new antimalarial agent, OZ439 containing a trioxolane unit as the main structural feature, has the unique property …
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Некоторые особенности перевода с литовского языка на русский терминов лечебной косметики /
… Danilenko (1977); S.I. Ozhegov (1992); A.A. Reformatsky (1996); E. Jakaitienė ( 2006), etc.) in sufficient detail, however each individual scientist has his/her own point of view on the terminology and its definition. Secondly, we analysed the classification of terms, briefly outlined …
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Synthesis of a Conjugated Ladder Polymer for Application in Direct Writing.
Since the discovery of electroluminescence in conjugated polymers in 1990, electro-optic devices such as light emitting diodes, flat panel all polymer displays, and lasers have received a great deal of attention. Greater conjugation in these pi-electron systems leads to enhanced fluorescence and …