GB291131A - An improved process for the production of benzanthrone derivatives - Google Patents

An improved process for the production of benzanthrone derivatives

Info

Publication number
GB291131A
GB291131A GB484127A GB484127A GB291131A GB 291131 A GB291131 A GB 291131A GB 484127 A GB484127 A GB 484127A GB 484127 A GB484127 A GB 484127A GB 291131 A GB291131 A GB 291131A
Authority
GB
United Kingdom
Prior art keywords
chlorbenzanthrone
nitro
methoxy
benzanthrone
methylbenzanthrone
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
GB484127A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to GB484127A priority Critical patent/GB291131A/en
Publication of GB291131A publication Critical patent/GB291131A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B3/00—Dyes with an anthracene nucleus condensed with one or more carbocyclic rings
    • C09B3/02—Benzathrones
    • C09B3/06—Preparation from starting materials already containing the benzanthrone nucleus

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

291,131. Johnson, J. Y., (I. G. Farbenindustrie Akt.-Ges.). Feb. 21, 1927. Benzanthrone derivatives. - Bz 1-methoxybenzanthrone and its derivatives are obtained by treating benzanthrone derivatives containing an interchangeable negative substituent in the Bz 1- position (e.g. a halogen atom or a nitro, sulphonic or sulphone group) with methyl alcohol in the presence of alkaline agents. The process is carried out by boiling under reflux or in an autoclave, caustic alkalis or alkaline carbonates being used as the alkaline agents, and in cases where nitrites are liable to be formed during the reaction, bodies adapted to destroy them, e.g. sodium sulphite or urea, may be added. The preparation of the following bodies is described in examples :-Bz 1-methoxybenzanthrone from Bz 1-nitro-, Bz 1-chlor-, and Bz 1-brom-benzanthrone from Bz-1-benzanthrone sulphonic acid and from Bz1: Bz1<1>-dibenzanthronyl sulphone (obtained by oxidizing Bz-1 : Bz-<1>-dibenzanthronyl sulphide with ammonium persulphate in sulphuric acid solution); Bz 1-methoxy-6-chlorbenzanthrone from Bz1-nitro-6-chlorbenzanthrone (obtained by nitrating 6-chlorbenzanthrone in nitrobenzene) and from Bz 1-brom-6-chlorbenzanthrone (obtained by brominating 6-chlorbenzanthrone in a solvent); Bz 1-methoxy-6-nitrobenzanthrone from Bz 1-dinitrobenzanthrone (example 5 of Specification 12518/06) and from Bz 1-chlor-6-nitrobenzanthrone : Bz 1-methoxy-6- methylbenzanthrone from Bz 1-nitro-6-methylbenzanthrone (example 8 of Specification 15979/11) and from Bz 1-chlor-6-methylbenzanthrone (obtained by chlorinating 6-methylbenzanthrone in a solvent); Bz 1-methoxy-8- chorbenzanthrone from Bz 1-nitro-8-chlorbenzanthrone (obtained by nitrating 8-chlorbenzanthrone in nitrobenzene) and from 8-Bz 1- dichlorbenzanthrane; and Bz 1-methoxy-6-brombenzanthrone from 6 : Bz 1-dibrombenzanthrone (example 3 of Specification 20837/06) and from Bz 1 - chlor-6-brombenzanthrone. Specification 257,618 also is referred to.
GB484127A 1927-02-21 1927-02-21 An improved process for the production of benzanthrone derivatives Expired GB291131A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB484127A GB291131A (en) 1927-02-21 1927-02-21 An improved process for the production of benzanthrone derivatives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB484127A GB291131A (en) 1927-02-21 1927-02-21 An improved process for the production of benzanthrone derivatives

Publications (1)

Publication Number Publication Date
GB291131A true GB291131A (en) 1928-05-21

Family

ID=9784784

Family Applications (1)

Application Number Title Priority Date Filing Date
GB484127A Expired GB291131A (en) 1927-02-21 1927-02-21 An improved process for the production of benzanthrone derivatives

Country Status (1)

Country Link
GB (1) GB291131A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4784805A (en) * 1986-05-15 1988-11-15 Ciba-Geiby Corporation Process for the preparation of anthraquinoid intermediates and vat dyes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4784805A (en) * 1986-05-15 1988-11-15 Ciba-Geiby Corporation Process for the preparation of anthraquinoid intermediates and vat dyes

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