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THIAZINES

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Originally appearing in Volume V26, Page 845 of the 1911 Encyclopedia Britannica.
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THIAZINES , in organic See also:

chemistry, a See also:series of cyclic compounds containing a See also:ring See also:system of four See also:carbon atoms, one See also:nitrogen and one See also:sulphur See also:atom. These may be grouped in three ways, giving the following skeletal structures: CCN C'NC C'NC (I.) C , (IL) CS , (III.) S'C Members of the first series have not as yet been isolated. Derivatives of the second type have been obtained by A. Luchmann (See also:Ben. 1896, 29, p. 1429) by condensing y-chlorbutylamine with carbon bisulphide or with See also:mustard See also:oils in the presence of See also:caustic See also:alkali; by M. Kahan (ibid., 1897, 30, p. 1321) on condensing bromhexylamine hydrobromide with thiobenzamide : See also:CH2'CH(See also:CH3)Br HS CH2'CH(CH3)'S (CH3)2C'N112 + HN:C'C6Hs (CHd)2C-N.seessesssC'C6Ii6 Benzothiazines are obtained from ortho-aminobenzyl halides and thio-amides : /CH2Br cm2' s Celli< +H2NCS'CHa--->C6H4c 1 \NNNH2 N—= 'CH3. The most important thiazines are those derived from class III., thiodiphenylamine, See also:C6H4\S>C6H4, being the See also:parent substance of the methylene See also:blue series of dyestuffs. Thiodiphenylamine is obtained synthetically by See also:heating sulphur with diphenylamine miaire (5th See also:October 1795) he opposed those Thermidorians who or by the condensation of ortho-aminothiophenol with pyro- wished to postpone the See also:dissolution of the See also:Convention. At the catechin. It is a See also:compound of neutral reaction.

The first elections for the See also:

Corps Legislatif he was elected by no less than known dyestuff of this series was Lauth's See also:violet, which was See also:thirty-two departments. It was only by the intervention of prepared by oxidizing paraphenylene diamine in See also:acid See also:solution Boulay de la Meurthe that he escaped transportation after the in the presence of sulphur. By using dimethyl paraphenylene coup d'etat of 18 Fructidor (4th See also:September 1797), and he then diamine in See also:place of the See also:simple diamine, methylene blue is returned to the practice of his profession. The See also:establishment obtained. The relationship of these substances to thiodiphenyl- of the consulate brought him back to public See also:life. He was made amine was shown by A. Bernthsen, who, by nitration of See also:prefect of the See also:Gironde, and then member of the See also:council of thiodiphenylamine, cbtained a dinitro-compound which on re- See also:state, in which capacity he worked on the See also:civil See also:code. He at duction was converted into the corresponding di-amino-deriva- this See also:time had See also:Napoleon's confidence, and gave him wholetive and this on oxidation yielded Lauth's violet. hearted support.

End of Article: THIAZINES

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