GB859287A - Triazolopyrimidine derivatives and their preparation - Google Patents
Triazolopyrimidine derivatives and their preparationInfo
- Publication number
- GB859287A GB859287A GB31606/58A GB3160658A GB859287A GB 859287 A GB859287 A GB 859287A GB 31606/58 A GB31606/58 A GB 31606/58A GB 3160658 A GB3160658 A GB 3160658A GB 859287 A GB859287 A GB 859287A
- Authority
- GB
- United Kingdom
- Prior art keywords
- methyl
- radical
- radicals
- general formula
- compound
- 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
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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Pharmacology & Pharmacy (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention comprises compounds having in one tautomeric form the general formula: <FORM:0859287/IV(b)/1> and their acid addition salts, (wherein R1, R2 and R3, which may be alike or unlike, are hydrogen atoms, alkyl radicals optionally substituted by hydroxy or alkoxy radicals or halogen atoms, or alkenyl or cycloalkyl radicals; R1 and R2, which may be alike or unlike, are amino or mono-or di-alkylamino radicals; R1 is a phenyl or alkylthio radical; R2 is an alkoxy radical or halogen atom; R3 is a halogen atom; or R2 and R3 may jointly form a polymethylene radical); and the preparation thereof by: (1) reacting a compound of the general formula: <FORM:0859287/IV(b)/2> with cyanogen halide, except when R1 and R2 are amino or mono-or di-alkylamino radicals; (2) when one of R1 and R2 is an amino or monoor di-alkylamino radical, reacting a compound of the general formula: <FORM:0859287/IV(b)/3> (wherein one of R4 and R5 is an alkylthio radica or a halogen atom and the other is a hydrogen atom or alkyl radical) with ammonia or a monoor di-alkylamine at an elevated temperature and pressure; (3) cyclising a compound of the general formula: <FORM:0859287/IV(b)/4> (wherein R6 and R7 are alkyl radicals or hydroge atoms; and R8 is -CONH2, -CSNH2, or -C(NH), S. Alk. (in the form of an acid addition salt) wherein alk is an alkyl radical) by heating with a phosphorus oxyhalide in the case where R8 is -CONH2, and by heating with a desulphurising agent in the case where R8 is -CSNH2 or -C(NH). S. Alk (in the form of an acid addition salt), (4) heating a compound of the general formula: <FORM:0859287/IV(b)/5> (wherein R1 and R11 are alkyl radicals) with a compound of the general formula X-C(NH)-NYZ (wherein X is an amino radical or a lower alkylthio radical; and Y and Z are hydrogen atoms or lower alkyl radicals), preferably in the form of an acid addition salt thereof; (5) when R3 is an alkyl radical, optionally substituted by hydroxyl radicals or halogen atoms, adding hydrogen or halogen atoms or hydroxyl radicals respectively to the corresponding compound wherein R3 is an alkenyl radical; and (6) reacting a compound of the general formula: <FORM:0859287/IV(b)/6> with ammonia. 2-Ethyl-4-methyl-6-hydrazinopyrimidine is made from 2-ethyl-4-methyl-6-chloropyrimidine and hydrazine hydrate. Similarly made is 2-n-propyl-4-methyl-6-hydrazinopyrimidine. 2-n-Propyl-4-methyl-6-chloropyrimidine is made by treating 2-n-propyl-4-methyl-6-hydroxypyrimidine with phosphorus oxychloride. Similarly made is 2-ethyl-4-methyl-6-chloropyrimidine. 4 - Methyl - 2 - n - propyl - 6 - (11 - semicarbazido)- pyrimidine is made by reacting 6-hydrazino-4-methyl-2-n-propylpyrimidine with sodium cyanate in the presence of hydrochloric acid. Similarly made is 4-chloro-2-methyl-6-(11-semicarbazido)-pyrimidine. 4-Methyl-2-n-propyl-6-(11-thiosemi-carbazido)-pyrimidine is made by reacting 6-hydrazino-4-methyl-2-n-propylpyrimidine hydrochloride with ammonium thiocyanate. 6 - (11 - S - Ethyl - isothiosemicarbziado) - 4 - methyl - 2 - n - propylpyrimidine hydriodide is made from 6-(11-thiosemicarbazido)-4-methyl-2-n-propylpyrimidine and ethyl iodide.ALSO:Pharmaceutical compositions comprise one or more compounds having in one tautomeric form the general formula: <FORM:0859287/VI/1> and their acid addition salts (wherein R 1, R2 and R 3, which may be alike or unlike, are hydrogen atoms or alkyl radicals, optionally substituted by hydroxy or alkoxy radicals or halogen atoms, or alkenyl or cycloalkyl radicals; R 1 and R2, which may be alike or unlike, are amino or mono- or di-alkylamino radicals. R 1 is phenyl or alkylthio radical, R2 is an alkoxy radical or halogen atom; R 3 is halogen atom; or R2 and R 3 may jointly form a polymethylene radical) in admixture with a non-toxic pharmaceutical carrier or diluent. They may be as solid or liquid compositions, and have a variety of therapeutic properties.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB31606/58A GB859287A (en) | 1958-10-03 | 1958-10-03 | Triazolopyrimidine derivatives and their preparation |
FR837073A FR378M (en) | 1958-10-03 | 1960-08-29 | Drug based on 2-amino-7-methyl-5-n-propyl-s-triazolo- [2,3-c] -pyrimidine as a bronchodilator. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB31606/58A GB859287A (en) | 1958-10-03 | 1958-10-03 | Triazolopyrimidine derivatives and their preparation |
Publications (1)
Publication Number | Publication Date |
---|---|
GB859287A true GB859287A (en) | 1961-01-18 |
Family
ID=10325663
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB31606/58A Expired GB859287A (en) | 1958-10-03 | 1958-10-03 | Triazolopyrimidine derivatives and their preparation |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR378M (en) |
GB (1) | GB859287A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4477450A (en) * | 1983-03-03 | 1984-10-16 | Riker Laboratories, Inc. | Triazolo [4,3-c]pyrimidines substituted by nitrogen-containing heterocyclic rings |
US4528288A (en) * | 1983-05-02 | 1985-07-09 | Riker Laboratories, Inc. | Substituted triazolo[1,5-c]pyrimidines |
US4532242A (en) * | 1983-05-02 | 1985-07-30 | Riker Laboratories, Inc. | Substituted triazolo[4,3-c]pyrimidines |
US4536579A (en) * | 1983-03-03 | 1985-08-20 | Riker Laboratories, Inc. | Pyrimidines substituted by nitrogen-containing heterocyclic rings as intermediates |
US4572910A (en) * | 1983-03-03 | 1986-02-25 | Riker Laboratories, Inc. | Triazolo[1,5-c]pyrimidines substituted by nitrogen-containing heterocyclic rings |
US4591588A (en) * | 1984-02-24 | 1986-05-27 | Riker Laboratories, Inc. | Triazolo[1,5-c]pyrimidines and bronchodilation use thereof |
US4612375A (en) * | 1983-05-02 | 1986-09-16 | Riker Laboratories, Inc. | Substituted 4-hydrazino-pyrimides as intermediates for triazolo [4,3-c]pyrimidines |
US4639445A (en) * | 1985-10-25 | 1987-01-27 | Riker Laboratories | Metabolites of triazolo[1,5-c]pyrimidines |
US5217973A (en) * | 1991-07-05 | 1993-06-08 | Laboratoires Upsa | Triazolopyrimidine derivatives which are angiotensin ii receptor antagonists processes for preparing them and pharmaceutical compositions containing them |
-
1958
- 1958-10-03 GB GB31606/58A patent/GB859287A/en not_active Expired
-
1960
- 1960-08-29 FR FR837073A patent/FR378M/en active Active
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4477450A (en) * | 1983-03-03 | 1984-10-16 | Riker Laboratories, Inc. | Triazolo [4,3-c]pyrimidines substituted by nitrogen-containing heterocyclic rings |
US4536579A (en) * | 1983-03-03 | 1985-08-20 | Riker Laboratories, Inc. | Pyrimidines substituted by nitrogen-containing heterocyclic rings as intermediates |
US4572910A (en) * | 1983-03-03 | 1986-02-25 | Riker Laboratories, Inc. | Triazolo[1,5-c]pyrimidines substituted by nitrogen-containing heterocyclic rings |
US4528288A (en) * | 1983-05-02 | 1985-07-09 | Riker Laboratories, Inc. | Substituted triazolo[1,5-c]pyrimidines |
US4532242A (en) * | 1983-05-02 | 1985-07-30 | Riker Laboratories, Inc. | Substituted triazolo[4,3-c]pyrimidines |
US4612375A (en) * | 1983-05-02 | 1986-09-16 | Riker Laboratories, Inc. | Substituted 4-hydrazino-pyrimides as intermediates for triazolo [4,3-c]pyrimidines |
US4591588A (en) * | 1984-02-24 | 1986-05-27 | Riker Laboratories, Inc. | Triazolo[1,5-c]pyrimidines and bronchodilation use thereof |
US4639445A (en) * | 1985-10-25 | 1987-01-27 | Riker Laboratories | Metabolites of triazolo[1,5-c]pyrimidines |
US5217973A (en) * | 1991-07-05 | 1993-06-08 | Laboratoires Upsa | Triazolopyrimidine derivatives which are angiotensin ii receptor antagonists processes for preparing them and pharmaceutical compositions containing them |
Also Published As
Publication number | Publication date |
---|---|
FR378M (en) | 1961-04-04 |
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