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5,7-Diamino 8-hydroxy quinazoline prepn. from 8-hydroxy quinazoline - and use as developer and or coupler in hair oxidn. dyes
5,7-Diamino 8-hydroxy quinazoline prepn. from 8-hydroxy quinazoline - and use as developer and or coupler in hair oxidn. dyes
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机译:5,7-二氨基8-羟基喹唑啉酯来自8-羟基喹唑啉-用作头发氧化剂的显影剂和/或成色剂。染料
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摘要
(I) is claimed. (I) is prepd. by nitrating 8-hydroxyquinazoline with HNO3 to obtain 5,7-dinitro-8-hydroxyquinazoline which is then hydrogenated in the presence of a Pd catalyst at room temp. Cpd. (I), opt. in the form of a salt, is used as developer and/or coupler in hair dye compsns. based on oxidn. dyestuffs, opt. together with other couplers and/or developers.
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