GB855784A - Improvements in or relating to optical whitening agents - Google Patents

Improvements in or relating to optical whitening agents

Info

Publication number
GB855784A
GB855784A GB3003256A GB3003256A GB855784A GB 855784 A GB855784 A GB 855784A GB 3003256 A GB3003256 A GB 3003256A GB 3003256 A GB3003256 A GB 3003256A GB 855784 A GB855784 A GB 855784A
Authority
GB
United Kingdom
Prior art keywords
formula
aralkyl
aryl
alkyl
hydrogen
Prior art date
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.)
Expired
Application number
GB3003256A
Inventor
Dennis Arthur William Adams
Asim Kumar Sarkar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hickson and Welch Ltd
Original Assignee
Hickson and Welch Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hickson and Welch Ltd filed Critical Hickson and Welch Ltd
Priority to GB3003256A priority Critical patent/GB855784A/en
Priority to ES0237741A priority patent/ES237741A1/en
Publication of GB855784A publication Critical patent/GB855784A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D487/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00
    • C07D487/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00 in which the condensed system contains two hetero rings
    • C07D487/04—Ortho-condensed systems

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Paper (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

The invention comprises compounds of the formula: <FORM:0855784/IV(b)/1> in which X is hydrogen or a group which is neither chromophoric nor auxochromic (e.g. alkyl, aryl, aralkyl, alkoxy or halogen), n is an integer of from 1 to 5 and R1 is hydrogen or a substituted or unsubstituted hydrocarbon radical (e.g. C1-6 alkyl, hydroxyalkyl, polyethanoxy, aryl, aralkyl, alkaryl, chlorophenyl or sulphophenyl) and salts thereof, particularly alkali metal salts. The compounds are obtained by diazotising a compound of the formula: <FORM:0855784/IV(b)/2> coupling the resulting diazo compound of the formula: <FORM:0855784/IV(b)/3> with a compound of the formula: <FORM:0855784/IV(b)/4> to give a dyestuff of the formula: <FORM:0855784/IV(b)/5> which is then oxidised with an alkali metal hypochlorite, cuprammonium sulphate, copper sulphate-pyridine soluble complex, thionylchloride or sulphuryl chloride. The compounds may be used alone or with other whitening agents for imparting whiteness to cotton, linen, paper and photographic paper, and are added to liquid or solid soaps or synthetic detergents.ALSO:Cotton, linen, paper and photographic paper are brightened by treatment with compounds of the formula: <FORM:0855784/IV (c)/1> in which X is hydrogen or a substituent which is neither chromophoric nor auxochromic (e.g. an alkyl, aryl, aralkyl or alkoxy group or halogen), n is an integer of from 1 to 5 and R1 is hydrogen or a substituted or unsubstituted hydrocarbon radical (e.g. C1-6 alkyl, hydroxyalkyl, polyethanoxy, aryl, aralkyl, alkaryl, chlorophenyl or sulphophenyl) and salts thereof particularly alkali metal salts. The whitening agents of the above formula may also be used for the above treatment in conjunction with other whitening agents. The compounds are obtained by diazotising a compound of the formula: <FORM:0855784/IV (c)/2> coupling the resulting diazo compound of the formula: <FORM:0855784/IV (c)/3> with a compound of the formula: <FORM:0855784/IV (c)/4> to give a dyestuff of the formula: <FORM:0855784/IV (c)/5> which is then oxidized with an alkali metal hypochlorite, cuprammonium sulphate, copper sulphate-pyridine soluble complex, thionylchloride or sulphuryl chloride.ALSO:Liquid or solid soaps and synthetic detergents are brightened by the addition of compounds of the formula: <FORM:0855784/III/1> in which X is hydrogen or a group which is neither chromophoric nor auxochromic (e.g. alkyl, aryl, aralkyl, alkoxy or halogen), n is an integer of from 1 to 5 and R1 is hydrogen or a substituted or unsubstituted hydrocarbon radical (e.g. C1-C6 alkyl, hydroxyalkyl, polyethanoxy, aryl, aralkyl, alkaryl, chlorophenyl or sulphophenyl) and salts thereof, particularly alkali metal salts. The above whitening agents may also be added in conjunction with other whitening agents.
GB3003256A 1956-10-02 1956-10-02 Improvements in or relating to optical whitening agents Expired GB855784A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3003256A GB855784A (en) 1956-10-02 1956-10-02 Improvements in or relating to optical whitening agents
ES0237741A ES237741A1 (en) 1956-10-02 1957-09-24 Improvements in or relating to optical whitening agents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3003256A GB855784A (en) 1956-10-02 1956-10-02 Improvements in or relating to optical whitening agents

Publications (1)

Publication Number Publication Date
GB855784A true GB855784A (en) 1960-12-07

Family

ID=10301166

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3003256A Expired GB855784A (en) 1956-10-02 1956-10-02 Improvements in or relating to optical whitening agents

Country Status (2)

Country Link
ES (1) ES237741A1 (en)
GB (1) GB855784A (en)

Also Published As

Publication number Publication date
ES237741A1 (en) 1958-04-01

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