Results 311 to 320 of about 797,239 (340)
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2002
Also known as Borsche carbazole synthesis, is the two-step conversion of phenyl hydrazine and cyclohexanone derivatives to the corresponding carbazole. Cf. Fischer indole synthesis.
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Also known as Borsche carbazole synthesis, is the two-step conversion of phenyl hydrazine and cyclohexanone derivatives to the corresponding carbazole. Cf. Fischer indole synthesis.
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Philological Encounters, 2016
This article examines Friedrich Schlegel’s theory of philological practice and presents it as crucial for any philology that seeks to establish its philosophical ground without taking resort to theory. Schlegel’s concepts and the form of argument he employs, as illustrated in his notes “On Philology”, are elucidated.
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This article examines Friedrich Schlegel’s theory of philological practice and presents it as crucial for any philology that seeks to establish its philosophical ground without taking resort to theory. Schlegel’s concepts and the form of argument he employs, as illustrated in his notes “On Philology”, are elucidated.
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Science, 2008
CHEMISTRY Few carbon-based compounds absorb light in the visible portion of the spectrum. Organic photochemical reactions therefore largely rely on irradiation in the ultraviolet, which is expensive to implement on a large scale and often introduces substantial excess energy into the system, which limits selectivity.
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CHEMISTRY Few carbon-based compounds absorb light in the visible portion of the spectrum. Organic photochemical reactions therefore largely rely on irradiation in the ultraviolet, which is expensive to implement on a large scale and often introduces substantial excess energy into the system, which limits selectivity.
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Cyclization in Opioid Peptides
Current Drug Targets, 2013Endogenous opioid peptides have been studied extensively as potential therapeutics for the treatment of pain. The major problems of using natural opioid peptides as drug candidates are their poor receptor specificity, metabolic instability and inability to reach the brain after systemic administration.
Justyna Piekielna +3 more
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The structure of cyclized rubber
Recueil des Travaux Chimiques des Pays-Bas, 1950AbstractThe history of cyclized rubber, including a series of structural formulae previously proposed for this polymer, is reviewed briefly.A new formula for cyclized rubber is suggested by applying electronic interpretations of reactions between electrophilic agents and tertiary alkyl olefins and tertiary halides respectively, to the corresponding ...
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Stereoselective Electrophilic Cyclization
The Chemical Record, 2015AbstractElectrophilic cyclizations of unactivated alkenes play highly important roles in the synthesis of useful building blocks. This account describes our contributions to the rational design of monofunctionalized chiral Lewis base catalysts for enantioselective iodo‐ and protocyclizations.
Kazuaki Ishihara, Akira Sakakura
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1996
Publisher Summary The chapter discusses the category Ic indole synthesis involves cyclization of α-anilino aldehydes or ketones under the influence of protonic or Lewis acids. The most successful examples involved alkylation of anilines with 7-haloacetoacetic esters or amides.
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Publisher Summary The chapter discusses the category Ic indole synthesis involves cyclization of α-anilino aldehydes or ketones under the influence of protonic or Lewis acids. The most successful examples involved alkylation of anilines with 7-haloacetoacetic esters or amides.
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The cyclization of natural rubber
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1963Several methods of measuring the unsaturation remaining in natural rubber after cyclization have been compared. Approximate agreem ent was obtained with the reagents, perbenzoic acid, phenyl iododichloride and ozone; iodine chloride gave high values. Perbenzoicacid is considered the most satisfactory of these reagents. The unsaturation in some cyclized
J. Scanlan, W. F. Watson, D. F. Lee
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Cyclization reactions of carotenoids
Pure and Applied Chemistry, 1969Abstract
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