Results 191 to 200 of about 4,962 (222)

Quinoxalino[2,3-b]-1,4-thiazines

Chemistry of Heterocyclic Compounds, 1971
Quinoxalino[2,3-b]-1,4-thiazines were obtained by the reaction of 2-aminoquinoxaline-3-thione and its 6,7-dimethyl derivative with α-halocarbonyl compounds. Hydrolysis of these compounds in alkaline and acid media gave 2-amino-3-quinoxalone and quinoxaline-2,3-dione. The IR and UV spectra are presented.
I. Ya. Postovskii, N. G. Koshel'
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Dielectric properties of thiazine derivatives

Electrochimica Acta, 1968
Abstract The thiazine derivatives promethazine, chlorpromazine, trimeprazine, prochlorperazine, trifluoperazine, methotrimeprazine and thioproperazine exhibit similar dielectric behaviour, and all except the last two are subject to severe supercooling.
F. Gutmann, H. Keyzer
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Dithieno‐1,4‐thiazines. Part I

Recueil des Travaux Chimiques des Pays-Bas, 1970
AbstractThe synthesis of the first dithieno[2,3‐b : 2′,3′‐e]‐1,4‐thiazine is described, this compound was prepared by condensation of 3‐thiophenethiol with methyl 2‐bromo‐3‐nitrothiophene‐5‐carboxylate followed by reduction, acylation, bromination with NBS and ringclosure with Cu, K2CO3 in nitrobenzene.A thieno‐1,4‐benzothiazine was prepared in the ...
C. J. Grol, J. S. Faber
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Luminescence of Leuco-Thiazine Dyes

Journal of Fluorescence, 2003
Details of the novel luminescence of the leuco forms of the thiazine dyes, methylene blue and thionine, are reported, including their emission maxima, quantum yields and lifetimes of the luminescence. Other work shows that this luminescence is independent of reducing agent type and solution pH and is a common feature of most thiazine dyes.
Lee, S.K., Mills, Andrew
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Synthesis of Bis[1,2]dithiolo[1,4]thiazines and a [1,2]Dithiolo[1,4]thiazine from Tertiary Diisopropylamines

The Journal of Organic Chemistry, 1999
The reaction of N-(2-chloroethyl)diisopropylamine 1a with S2Cl2 allows the selective one-pot preparation of the tricyclic 4-(2-chloroethyl) bisdithiolothiazines 2-4 or, by addition of phosphorus pentasulfide at a late stage in the reaction, of the dithiolothiazine 5. The chloroethyl derivative 2 is also obtained from (2-diisopropylamino)ethanethiol 1b,
Charles W, Rees, Andrew J P, White, David J, Williams, Oleg A, Rakitin, Lidia S, Konstantinova, Carlos F, Marcos, Tomás, Torroba   +6 more
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ChemInform Abstract: STUDIES ON 1,3‐THIAZINES. PART 20. TRANSACYLATING N‐ACYLTETRAHYDRO‐1,3‐THIAZINE‐2‐THIONES

Chemischer Informationsdienst, 1984
AbstractDie aus dem Thiazinthion (I) hergestellten N‐Acylthiazinthione (III) zeigen gegenüber nucleophilen Verbindungen (IV) transacylierende Eigenschaften.
W. HANEFELD, E. BERCIN
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1,2-Thiazines and benzo derivatives

1991
Sulfur atoms can exhibit a valency of four allows the formation of 1-substituted 1, 2-thiazines with a double bond between two heteroatoms, and the second bond elsewhere in the ring. Although these compounds could be described as “dihydro derivatives,” they are isomeric with 1, 2-thiazines, in which the valency of the sulfur atom is two and there is no
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Tetrahydro-1,4-thiazin (Thiamorpholin)

Synthesis, 1970
Harald HÜCKSTÄDT, Karl-Heinz MAYER
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[Pyrazolo[3,4d][1,3]thiazine systems].

Il Farmaco; edizione scientifica, 1979
The synthesis of 1,2,4,6-tetrahydro-2-methyl-3-hydroxypyrazolo [3,4-d] [1,3]thiazine-4,6-dithione is described. By spectroscopic methods the anphionic structure of this and other related compounds is demonstrated. In addition, the action of alkylating reagents upon pyrazolo-[3,4-d] [1,3]thiazine-4,6-dithionic compounds is examined and described.
G, Auzzi, L, Cecchi, A, Costanzo, L, Pecori Vettori, F, Bruni   +4 more
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Thiazine

2018
Shalki Choudhary, Om Silakari
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