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Chemistry of Heterocyclic Compounds: Five Member - download pdf or read online

By L. L. Bambas, Arnold Weissberger

ISBN-10: 0470186534

ISBN-13: 9780470186534

ISBN-10: 0470375876

ISBN-13: 9780470375877

The Chemistry of Heterocyclic Compounds, in view that its inception, has been famous as a cornerstone of heterocyclic chemistry. every one quantity makes an attempt to debate all points – houses, synthesis, reactions, physiological and commercial value – of a selected ring method. to maintain the sequence up to date, supplementary volumes overlaying the hot literature on each one person ring procedure were released. Many ring structures (such as pyridines and oxazoles) are handled in unique books, each one including separate volumes or components facing various person subject matters. With all authors are well-known professionals, the Chemistry of Heterocyclic Chemistry is taken into account around the globe because the imperative source for natural, bioorganic, and medicinal chemists.

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Read or Download Chemistry of Heterocyclic Compounds: Five Member Heterocyclic Compounds With Nitrogen and Sulfur or Nitrogen, Sulfur and Oxygen (Except Thiazole), Volume 4 PDF

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Extra info for Chemistry of Heterocyclic Compounds: Five Member Heterocyclic Compounds With Nitrogen and Sulfur or Nitrogen, Sulfur and Oxygen (Except Thiazole), Volume 4

Example text

SGderbtlck represented the transformation by equation (27). (XVII) (XVI1I) S i j d e r b a ~ kalso ~ ~ investigated the polymers obtained by the polymerization of thiocyanic acid. A red polymer waa obtained from the spontaneous decomposition of free thiocyanic acid, and a white polymer by the spontaneous decomposition of sodium 3-mercapto-5-chloro-1,2,4thiadiazole in water, acetone, and alcohol. This polymer had the empirical formula (S3CaNa)p and was designated by Sijderback as hexathiocyanate (XIX).

The preparation of the “labile or real” perthiocyanic acid consisted of digesting isoperthiocyanic acid with barium hydroxide. Sulfur at first precipitated and then largely redissolved. A barium salt of perthiocyanic acid was isolated. This salt in a dilute solution when precipitated with hydrochloric acid gave isoperthiocyanic acid. If the decomposition of the salt with hydrochloric acid took place at 0°C. ), the free perthiocyanic acid was isolated. This acid, which was colorless and easily soluble in water and ether, readily changed to isoperthiocyanic acid, which was yellow and difficultly soIuble in water and ether.

Acid S thiadiaeole 47 S-Chlorobenm- + nitrous S 0 compoumd 43 0 Method of preparation 46 Perbromide of l,Z,bbenzothiac dmle dimledione $WAOt@l,- 45 5,6-DianilindI7- nitrosomilimo> 4,7-benzothiadimledione 44 6ChloroS-(N- diazoledione 4,7-hpthia- 43 6 C h l o r ~ a n i l m o - 1 No. p.. OC. ethanol acetic acid benzene aic. , 110 Sintem 80", 130-5 228 dec. , 277,209 (1893). 4 5 6 7 8 Constituent R Substituted benzothiadiszole NO. , 'C. TABLE IIIC. ' Quaternary Salts Prepared from the Benzothiadiazoles Having the General Structure: ii;' I 3 N Naphothiadiazoles.

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Chemistry of Heterocyclic Compounds: Five Member Heterocyclic Compounds With Nitrogen and Sulfur or Nitrogen, Sulfur and Oxygen (Except Thiazole), Volume 4 by L. L. Bambas, Arnold Weissberger


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