Results 161 to 170 of about 35,228 (210)

ChemInform Abstract: SYNTHESIS OF 1,2,4‐TRIAZINES, VIII. SYNTHESIS OF 1,2,4‐TRIAZINE 4‐OXIDES

Chemischer Informationsdienst, 1978
AbstractDie aus den Hydrazono‐oximen (I) und den Orthocarbonsäureestern (II) erhältlichen Esterhydrazone (III) werden beim Erhitzen in Benzonitril (200°C) zu den Triazinoxiden (IV) cyclisiert.
V. BOEHNISCH, G. BURZER, H. NEUNHOEFFER
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Preparation of new 1,2,4‐triazines

Journal of Heterocyclic Chemistry, 1982
AbstractSeveral 1,2,4‐triazines were synthesized. 13C‐ and 15N‐nmr spectroscopy was employed for structure determination.
Oljan Repič, P. G. Mattner, M. J. Shapiro   +2 more
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Merocyaninfarbstoffe aus 1,2,4-Triazin

Monatshefte für Chemie, 1968
Hydrazinderivate von 1,2,4-Triazinen liefern mit Acetessigester Pyrazolonderivate. Diese kondensieren sich mit Salzen quartarer heterocyclischer Basen zu Merocyaninfarbstoffen. Darstellung und Spektren von drei Typen solcher Farbstoffe werden beschrieben.
Engelbert Kiša, Jaromír Hadáček
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Kondensierte Dihydro‐1,2,4‐triazine

Archiv der Pharmazie, 1987
AbstractHydrazone von α‐Aminoketonen mit cyclischem Aminanteil ergeben mit Quecksilber (II)‐EDTA eine Cyclodehydrierung zu entspr. kondensierten Dihydrotriazinen.
Hans Möhrle, Peter Schillings
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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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ChemInform Abstract: 1,2,4‐TRIAZINES. SYNTHESIS OF SELECTED MEMBERS OF THE S‐TRIAZOLO(3,4‐F)(1,2,4)TRIAZINE AND TETRAZOLO(1,5‐F)(1,2,4)TRIAZINE

Chemischer Informationsdienst, 1979
Abstract3‐Amino‐l ,2,4‐triazin (I) liefert bei der Oxidation das Triazinon (IIa), das zu (IIb) bromiert wird und die Austauschprodukte (IIc) und (IId) gibt.
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Nucleophilic substitution of 1,2,4‐triazines

Journal of Heterocyclic Chemistry, 1985
AbstractThe reaction of 3‐(methylthio)‐5‐carbethoxy‐1,2,4‐triazine (5) with ammonia was found to yield products from not only ammonia but also methanethiolate displacements. An account of the transformations and the products observed is given. The 3‐position of 3,6‐bis(methylthio)‐5‐carbamoyl‐1,2,4‐triazine (7) was shown to be more reactive than the 6 ...
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Synthesis of 1,2,4-Triazine -Oxides from 1,2,4-Triazines

2004
C. W. Lindsley, M. E. Layton
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Conversion of 1,2,4-Triazin-5(2)-ones or 1,2,4-Triazine-5(2)-thiones into 1,2,4-Triazines

2004
C. W. Lindsley, M. E. Layton
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Triazines: Syntheses and Inverse Electron-demand Diels–Alder Reactions

Chemical Reviews, 2021
Fa-Guang Zhang, Jun-An Ma, Xiaodong Tang   +2 more
exaly