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GB414452A - The manufacture of asymmetrical thiourea-derivatives - Google Patents

The manufacture of asymmetrical thiourea-derivatives

Info

Publication number
GB414452A
GB414452A GB732933A GB732933A GB414452A GB 414452 A GB414452 A GB 414452A GB 732933 A GB732933 A GB 732933A GB 732933 A GB732933 A GB 732933A GB 414452 A GB414452 A GB 414452A
Authority
GB
United Kingdom
Prior art keywords
hydrochloride
thiourea
derivatives
ethyl
amine
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
GB732933A
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 GB732933A priority Critical patent/GB414452A/en
Publication of GB414452A publication Critical patent/GB414452A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C335/00Thioureas, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
    • C07C335/04Derivatives of thiourea
    • C07C335/16Derivatives of thiourea having nitrogen atoms of thiourea groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C335/00Thioureas, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
    • C07C335/04Derivatives of thiourea
    • C07C335/16Derivatives of thiourea having nitrogen atoms of thiourea groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton
    • C07C335/18Derivatives of thiourea having nitrogen atoms of thiourea groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton being further substituted by singly-bound oxygen atoms

Landscapes

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

Abstract

Thiourea derivatives of the formula R1R2NCSNH2, where R1 is an aryl group and R2 is hydrogen or an alkyl or aryl group, are prepared by heating mineral acid salts of amines of the formula R1R2NH with an alkali thiocyanate or ammonium thiocyanate in the presence of an inert organic diluent. The mineral acid salt of the amine may be prepared in situ, for example by adding sulphuric acid or gaseous hydrogen chloride to a mixture of the amine with the organic diluent. The thiourea derivatives may be converted in known manner into thiazole derivatives without intermediate isolation. Examples are given of the preparation of phenylthiourea from aniline hydrochloride; 4-ethoxyphenylthiourea from p-phenetidine hydrochloride or sulphate; p-tolythiourea from p-toluidine sulphate; asym. diphenylthiourea from diphenylamine hydrochloride; asym. ethyl-1-naphthylthiourea from N-ethyl-1-naphthylamine hydrochloride; 8-methoxynaphthyl-1-thiourea from 8-methoxy-1-naphthylamine hydrochloride; indazyl-4-thiourea from 4-aminoindazole hydrochloride; 1 : 5-naphthylenedithiourea from 1 : 5-naphthylenediamine hydrochloride; carbazyl-2-thiourea from 2-aminocarbazole hydrochloride; 9 - ethylcarbazyl - 3 - thiourea from 9 - ethyl - 3 - aminocarbazole hydrochloride; and 8-chloroquinolyl - 5 - thiourea from 8 - chloro - 5 - amino - quinoline hydrochloride; in each example the amine salt is heated to 90--130 DEG C. with sodium or ammonium thiocyanate in the presence of an organic diluent, which may be chlorobenzene, o-dichlorobenzene, benzine, or butyl alcohol. 4-Ethoxyphenylthiourea obtained as described above may be treated, without isolation, with disulphur dichloride to form 2-amino-6-ethoxybenzothiazole; similarly, p - tolylthiourea obtained as described above may be treated with bromine or sulphuryl chloride to form 6-methyl-2-aminobenzothiazole. Specifications 345,735 and 347,141 are referred to.
GB732933A 1933-03-10 1933-03-10 The manufacture of asymmetrical thiourea-derivatives Expired GB414452A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB732933A GB414452A (en) 1933-03-10 1933-03-10 The manufacture of asymmetrical thiourea-derivatives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB732933A GB414452A (en) 1933-03-10 1933-03-10 The manufacture of asymmetrical thiourea-derivatives

Publications (1)

Publication Number Publication Date
GB414452A true GB414452A (en) 1934-08-09

Family

ID=9831016

Family Applications (1)

Application Number Title Priority Date Filing Date
GB732933A Expired GB414452A (en) 1933-03-10 1933-03-10 The manufacture of asymmetrical thiourea-derivatives

Country Status (1)

Country Link
GB (1) GB414452A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4367345A (en) * 1980-05-06 1983-01-04 Ihara Chemical Industry Co., Ltd. Process for producing tolylthiourea having high purity

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4367345A (en) * 1980-05-06 1983-01-04 Ihara Chemical Industry Co., Ltd. Process for producing tolylthiourea having high purity

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