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Studies on Heterocyclic Colouring Matters Part II: Δ2,2′ -Bi (2H-1, 4-benzothiazines)

✍ Scribed by B. L. Kaul

Book ID: 102855450
Publisher: John Wiley and Sons
Year: 1974
Tongue: German
Weight: 751 KB
Volume: 57
Category: Article
ISSN: 0018-019X
DOI: 10.1002/hlca.19740570846

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✦ Synopsis

Abstract

A novel one‐step ‘Inverse Indigo Synthesis’ of the Δ^2,2′^‐bi(3,4‐dihydro‐3‐oxo‐2__H__‐1, 4‐benzothiazine) chromophore is described. Structure, substitution reactions, mechanism of formation, colour and other relevant properties of this system have been investigated in relation to known thioindigos. A synthesis of the basic skeleton of one of the ‘Trichosiderins’, the colouring matters of human red hair, is reported.

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