ES240261A1 - A procedure for the preparation of optical blanking agents (Machine-translation by Google Translate, not legally binding)
- Google Patents
A procedure for the preparation of optical blanking agents (Machine-translation by Google Translate, not legally binding)
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Hickson and Welch Ltd
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Hickson and Welch Ltd
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Application filed by Hickson and Welch LtdfiledCriticalHickson and Welch Ltd
Priority to ES0240261ApriorityCriticalpatent/ES240261A1/en
Publication of ES240261A1publicationCriticalpatent/ES240261A1/en
A process for the preparation of optical bleaching agents of the general formula: ** (See formula) ** and salts thereof, wherein R is a substituted or unsubstituted phenyl group, and is one of the following groups, ie: A substituted or unsubstituted aryloxy group, A monosubstituted or disubstituted amino group, An NH.CO.NHZ group (in which Z is hydrogen or an alkyl or aryl group), An alkyl group, An alkylaryl group, An aryl group and where A represents one of the following residues: ** (See formula) ** where R1 and R2 are hydrogen or a hydrocarbon radical which may be substituted, which comprises oxidizing an o-amino azo dye of the formula ** (See formula) ** where R, Y and A have the meanings indicated above. (Machine-translation by Google Translate, not legally binding)
ES0240261A1958-03-201958-03-20A procedure for the preparation of optical blanking agents (Machine-translation by Google Translate, not legally binding)
ExpiredES240261A1
(en)
Process of preparation of a nitrophurane represented by the formula: o2 - o = ch = n - a, in which represents a 2,4-dioxi-imidazolidil, 2-oxo-3-oxazolidil, o 2-oxo-5 ureide -ircariamino-metil-3-oxazolidil, in form of radical. (Machine-translation by Google Translate, not legally binding)