Results 121 to 130 of about 2,785 (181)

1,2,4‐triazines. III. A convenient synthesis of 1,2,4‐triazines and their covalent hydration

Journal of Heterocyclic Chemistry, 1970
AbstractA general synthesis of 1,2,4‐triazines, from 3‐methylthiotriazines is described. It has been shown that 1,2,4‐triazines undergo covalent hydration across the N4‐C5 bond.
William W. Paudler, Teh‐Kuei Chen
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Chemistry of 1,2,4‐triazines, XV. First metalation of 1,2,4‐triazine derivatives

Liebigs Annalen der Chemie, 1993
Abstract5‐Methoxy‐1,2,4‐triazines 2 were lithiated with lithium 2,2,6,6‐tetramethylpiperidide and the formed 6‐lithio‐5‐methoxy‐1,2,4‐triazines 4 trapped with aldehydes or iodine.
Nelly Plé, Alain Turck, Guy Quéguiner, Bernd Glassl, Hans Neunhoeffer   +4 more
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Synthesis of 1,2,4-Triazines; XIII. Regioselective Synthesis of Trialkyl-1,2,4-triazines

HETEROCYCLES, 1992
Trialkyl-1,2,4-triazines (3) were prepared by heating α-oxoacylhydrazones (4) or N,N-dimethylaminomethylene hydrazones (19) with ammonium acetate at 100°C.
Hans Neunhoeffer, Tadashi Ohsumi
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ChemInform Abstract: 1,2,4‐Triazine. Part 4. Conversion of 1,2,4‐Triazine N4‐Oxides to Chloro‐ and Chloromethyl‐1,2,4‐triazines with POCl3.

ChemInform, 1993
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
J. K. LEE, H. C. KWON, H. G. KIM
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1,2,4-triazines and condensed derivatives—XIV

Tetrahedron, 1974
Abstract 3 - Alkylthio - 6,7 - dihydro - [1.2.4]triazino - [1.6-c]quinazolin - 5 - ium - 1 - olates (3), prepared by condensation of 3 - alkylthio -6-(2- aminophenyl) - 1,2,4 - triazin - 5(2H) - ones (1) with aldehydes, ketones or their equivalents are transformed by thermolysis and/or acid treatment into 3 - alkylthio - [1.2.4]triazino[5.6-b]indoles
G. Doleschall, K. Lempert
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1,2,4-Triazines Are Versatile Bioorthogonal Reagents

Journal of the American Chemical Society, 2015
A new class of bioorthogonal reagents, 1,2,4-triazines, is described. These scaffolds are stable in biological media and capable of robust reactivity with trans-cyclooctene (TCO). The enhanced stability of the triazine scaffold enabled its direct use in recombinant protein production.
David N, Kamber, Yong, Liang, Robert J, Blizzard, Fang, Liu, Ryan A, Mehl, K N, Houk, Jennifer A, Prescher   +6 more
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Reaction of 1,2,4-triazines with nitronate anions, direct nucleophilic acylation of 1,2,4-triazines.

Tetrahedron Letters, 1984
Abstract Nitronate anions replace 5-hydrogen atom in a variety of 3-substituted 1,2,4-triazine derivatives giving oximes of 5-formyl and 5-acyl 1,2,4-triazines.
A. Rykowski, M. Mąkosza
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From 3-chloromethyl-1,2,4-triazine 4-oxides to various substituted pyridines and 1,2,4-triazines

Russian Chemical Bulletin, 2005
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
V. N. Kozhevnikov, D. N. Kozhevnikov, O. V. Shabunina, N. N. Kataeva, S. A. Yushchuk, V. L. Rusinov, O. N. Chupakhin   +6 more
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ChemInform Abstract: SYNTHESIS OF 1,2,4‐TRIAZINES. IX. SYNTHESIS OF CYCLOPENTA(E)‐1,2,4‐TRIAZINES

Chemischer Informationsdienst, 1982
AbstractDie Vertreter (IV), (XI), (XII) und (XIII) des bisher unbekannten Titel‐Systems werden durch Kondensation der entsprechenden Diole (I) mit den Amidrazonen (II), (VI) [oder (VII)], (VII) bzw. (IX) dargestellt, wobei die Richtung der Reaktion von (V) lösungsmittelabhängig ist [eine Umlagerung von (VII) in (VI) erfolgt in ammoniakalischem Methanol]
H.‐J. METZ, H. NEUNHOEFFER
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Condensed 1,2,4‐Triazines, III

Archiv der Pharmazie, 1980
AbstractAlkylation of 3‐mercaptophenanthreno[9,10‐e]‐1,2,4‐triazine (1b) yielded the S‐alkyl derivatives 2 a‐d. Amination of 1a afforded the 3‐amino derivatives 3a‐h. Reaction of 1a with hydrazine hydrate gave 3‐hydrazinophenanthreno[9,10‐e]‐1,2,4‐triazine (4) which underwent cyclisation with nitrous, formic or acetic acids giving the phenanthreno[9,10‐
Vishnu Ji Ram, Hrishi Kesh Pandey
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