Results 201 to 210 of about 43,224 (237)
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Direct diacylation of schiff bases
Tetrahedron Letters, 1988Abstract A novel diacylation of Schiff bases occurs using catalytic quantities of cobalt carbonyl and phase transfer catalysis conditions.
VASAPOLLO, Giuseppe, Alper Howard
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Journal of Macromolecular Science: Part A - Chemistry, 1967
Abstract This paper compares the syntheses and the thermal stabilities of twelve related conjugated, pseudoconjugated, and nonconjugated Schiff base polymers of the general formula in which Z represents The polymers were prepared (a) by the condensation of Z(NH2)2 and p-C6 H4(CHO)2 in (1) solution and (2) as melts, and (b) by three new Schiff base ...
G. F. D'alelio +3 more
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Abstract This paper compares the syntheses and the thermal stabilities of twelve related conjugated, pseudoconjugated, and nonconjugated Schiff base polymers of the general formula in which Z represents The polymers were prepared (a) by the condensation of Z(NH2)2 and p-C6 H4(CHO)2 in (1) solution and (2) as melts, and (b) by three new Schiff base ...
G. F. D'alelio +3 more
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Experientia, 1964
Vond-Cycloserin ist die erste Schiffsche Base isoliert und charakterisiert worden. Bei Erhitzen in Athylalkohol unterbleibt die Umlagerung in einen Cycloserindimerenabkommling und ergibt Racemisierung. Es wird gefolgert, dass Aldehyde nicht auf das Stickstoffatom des Isoxazolidons reagieren und dass Dimerisation von Cycloserinnicht fur die Reaktion mit
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Vond-Cycloserin ist die erste Schiffsche Base isoliert und charakterisiert worden. Bei Erhitzen in Athylalkohol unterbleibt die Umlagerung in einen Cycloserindimerenabkommling und ergibt Racemisierung. Es wird gefolgert, dass Aldehyde nicht auf das Stickstoffatom des Isoxazolidons reagieren und dass Dimerisation von Cycloserinnicht fur die Reaktion mit
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2023
This chapter provides an engaging overview of Schiff bases, highlighting their versatility in various chemical applications. Covering the synthesis, structural diversity, and multifaceted reactivity of Schiff bases, the introduction delves into their significance in coordination chemistry, bioinorganic systems, and medicinal chemistry.
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This chapter provides an engaging overview of Schiff bases, highlighting their versatility in various chemical applications. Covering the synthesis, structural diversity, and multifaceted reactivity of Schiff bases, the introduction delves into their significance in coordination chemistry, bioinorganic systems, and medicinal chemistry.
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Polymeric Schiff Bases. VI. The Direct Syntheses of Poly-Schiff Bases
Journal of Macromolecular Science: Part A - Chemistry, 1967Abstract The synthesis of black, high molecular weight polymeric Schiff bases directly from aryldiamines and aryldialdehydes by two methods is described. The first method utilizes benzylideneaniline as the reaction medium. The second method is a direct one-step synthesis involving the reaction of the aryldiamine, aryldialdehyde, aniline, and ...
G. F. D'alelio +3 more
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Schiff's bases of polyallylamine
Polymer Bulletin, 1987Schiffs bases of polyallylamine were synthesized by the reaction with four aldehydes. Salicylaldehyde (S)- and 2-pyridinecarboxaldehyde (P)-Schiff's base could be used as reverse osmosis membranes when crosslinked with divinyl sulfone, diacetyl or ethylene glycol diglycidyl ether.
Eizo Oikawa, Ken Yahata
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1988
The Schiff base complexes described in this chapter are derived from ligands obtained by the reaction of aldehydes or ketones with amines. Ligation to manganese occurs through the nitrogen atom of the azomethine group (>C=N−), as well as through other functional groups present in the ligand, such as hydroxy and carboxy groups or other groups containing
L. J. Boucher +5 more
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The Schiff base complexes described in this chapter are derived from ligands obtained by the reaction of aldehydes or ketones with amines. Ligation to manganese occurs through the nitrogen atom of the azomethine group (>C=N−), as well as through other functional groups present in the ligand, such as hydroxy and carboxy groups or other groups containing
L. J. Boucher +5 more
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Journal of the Chemical Society, Chemical Communications, 1976
Although very few examples of chemiluminescent Schiff bases have been described, and attempts to extend this class of reaction have hitherto been unsuccessful, it is now shown that these compounds are generally chemiluminescent on oxidation, with reasonable efficiency.
Frank McCapra, Alexander Burford
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Although very few examples of chemiluminescent Schiff bases have been described, and attempts to extend this class of reaction have hitherto been unsuccessful, it is now shown that these compounds are generally chemiluminescent on oxidation, with reasonable efficiency.
Frank McCapra, Alexander Burford
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Tetrahedron, 1970
Abstract Various tautomeric forms have been postulated for pyridoxal Schiff bases, including the ring-chain tautomers aldimine ∡ aminoacetal (Ia ∡ Ib). We have found that acylation stabilizes either the aldimine or the aminoacetal form, depending on the structure of the Schiff base and the acylating agent used.
W. Korytnyk, H. Ahrens, N. Angelino
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Abstract Various tautomeric forms have been postulated for pyridoxal Schiff bases, including the ring-chain tautomers aldimine ∡ aminoacetal (Ia ∡ Ib). We have found that acylation stabilizes either the aldimine or the aminoacetal form, depending on the structure of the Schiff base and the acylating agent used.
W. Korytnyk, H. Ahrens, N. Angelino
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The pK of Schiff base deprotonation in bacteriorhodopsin
Biochemical and Biophysical Research Communications, 1978Abstract Kinetic resonance Raman spectroscopy as a function of pH has been utilized to determine the pK of Schiff base deprotonation during the bacteriorhodopsin photochemical cycle. It is shown that the pK of Schiff base deprotonation is between 9.9 and 10.3, microseconds after light absorption and is >12 before photon initiation of photochemical ...
B, Ehrenberg, A, Lewis
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