Published December 31, 1943
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DYES DERIVED FROM ACENAPHTHENEQUINONE, PART VIII, (7--METHYL)THIONAPHTHENE- ACENAPHTHYLENE-INDIGOS
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Description
Acenaphthenequinone and its various substituted products have been condensed with 7-methl-3- hydroxythionaphthene and the corresponding thinindigoid vat dyes obtained. The previous method of preparation of 7-methyl-3-bydroxythioinaphthenc has been modified, 7 : 7'-Dimethyltbioindigo has been obtained from 7-methyl-3-hydroxythionaphthene.