GB407194A - Improvements in the manufacture and production of nitrogenous condensation products - Google Patents

Improvements in the manufacture and production of nitrogenous condensation products

Info

Publication number
GB407194A
GB407194A GB7422/33A GB742233A GB407194A GB 407194 A GB407194 A GB 407194A GB 7422/33 A GB7422/33 A GB 7422/33A GB 742233 A GB742233 A GB 742233A GB 407194 A GB407194 A GB 407194A
Authority
GB
United Kingdom
Prior art keywords
yellow
prepared
nitrobenzene
quinone
give
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
GB7422/33A
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
Publication of GB407194A publication Critical patent/GB407194A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
    • C07D471/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
    • C07D471/06—Peri-condensed systems
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D221/00—Heterocyclic compounds containing six-membered rings having one nitrogen atom as the only ring hetero atom, not provided for by groups C07D211/00 - C07D219/00
    • C07D221/02—Heterocyclic compounds containing six-membered rings having one nitrogen atom as the only ring hetero atom, not provided for by groups C07D211/00 - C07D219/00 condensed with carbocyclic rings or ring systems
    • C07D221/04—Ortho- or peri-condensed ring systems
    • C07D221/18—Ring systems of four or more rings

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pyridine Compounds (AREA)

Abstract

Pyridino compounds of pyrene or chrysene are subjected to an oxidizing treatment in acid media, and if desired, the products so formed are halogenated. Chromic acid is preferably used as oxidizing agent and quinones are formed, which may be purified by the usual methods. In examples: (1) dipyridinopyrene (prepared by nitrating pyrene in nitrobenzene, reducing and converting the diamino body by Skraup synthesis) is treated with bichromate and sulphuric acid to give a greenish-yellow dyeing quinone; dimethyldipyridinopyrene (prepared according to Doebner and Von Miller synthesis from diaminopyrene) may be similarly treated; (2) monopyridinopyrene (prepared by a Skraup synthesis on monaminopyrene) is treated in glacial acetic acid with chromic anhydride to give an orange-yellow dyeing quinone; on brominating this in nitrobenzene in presence of iodine and iron a yellow vat dye is obtained; by action of sulphuryl chloride on the quinone a yellow dye is also obtained, and halogenation may also be carried out in chlorsulphonic or sulphuric acids; (3) dipyridinochrysene (prepared by nitrating chrysene in nitrobenzene, reducing and converting the diamino compound by a Skraup synthesis) is oxidized as in (2) to give a reddish-yellow dye. Specification 349,059 is referred to. The Specification as open to inspection under Sect. 91 relates to the introduction of substituents into the oxidized products and mentions nitro and amino substituting groups. This subject-matter p does not appear in the Specification as accepted.
GB7422/33A 1932-03-19 1933-03-11 Improvements in the manufacture and production of nitrogenous condensation products Expired GB407194A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE407194X 1932-03-19

Publications (1)

Publication Number Publication Date
GB407194A true GB407194A (en) 1934-03-15

Family

ID=6422144

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7422/33A Expired GB407194A (en) 1932-03-19 1933-03-11 Improvements in the manufacture and production of nitrogenous condensation products

Country Status (1)

Country Link
GB (1) GB407194A (en)

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