Thio-indigo dyestuffs

Details Thio-indigo dyestuffs Thio-indigo dyestuffs

1980-05-09

1981-08-18

Randolph, John D.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C09B 700

Patent

active

042847893

ABSTRACT:
Thioindigo and its derivatives are obtained in high yield and excellent purity by oxidizing corresponding 3-hydroxy-thionaphthenes with peroxo-disulfate in an aqueous alkaline solution.

REFERENCES:
patent: 876839 (1908-01-01), Pummerer
patent: 2804464 (1957-08-01), Kaplan et al.
patent: 2898337 (1969-08-01), McSheehy
Venkataraman, The Chemistry of Synthetic Dyes, vol. II, pp. 1031 to 1039, Academic Press Inc. (NY) 1952.
Spietschka et al., Chem. Abstracts, vol. 85, abst. 144704k (1976) (abst. of Ger. Offen. No. 2,504,935, published 8-19-76).
Chemical Abstracts, 9th Collective Index, p. 27442CS, copyrighted by Am. Chem. Society, Columbus, Ohio (1978).

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