GB983723A - 4-hydroxy-5-halogeno pyrimidines and the preparation thereof - Google Patents
4-hydroxy-5-halogeno pyrimidines and the preparation thereofInfo
- Publication number
- GB983723A GB983723A GB284363A GB284363A GB983723A GB 983723 A GB983723 A GB 983723A GB 284363 A GB284363 A GB 284363A GB 284363 A GB284363 A GB 284363A GB 983723 A GB983723 A GB 983723A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ethyl
- group
- prepared
- fluoroacetate
- reacting
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/30—Loose or shaped packing elements, e.g. Raschig rings or Berl saddles, for pouring into the apparatus for mass or heat transfer
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
The invention comprises pyrimidines of the general formula <FORM:0983723/C2/1> wherein R1 and R2, which may be the same or different, represent hydrogen atoms or straight or branched chain alkyl groups containing 1 to 5 carbon atoms, and Hal represents a halogen atom-particularly fluorine, chlorine or iodine; and the preparation thereof by heating compounds of the general formula <FORM:0983723/C2/2> wherein Hal has the above significance, R2 has the above significance or represents a carbalkoxy group, R3 represents the methyl or ethyl group, and R4 represents hydrogen, an alkali metal or the methyl or ethyl group with compounds of the general formula <FORM:0983723/C2/3> wherein Y has the same significance as R1 or represents the group R5S in which R5 represents hydrogen or an alkyl group containing 1 to 4 carbon atoms or an aralkyl group and, when R2 represents a carbalkoxy group, hydrolysing and decarboxylating the product and when Y represents the group R5S desulphurizing the product to replace the R5S group by a hydrogen atom, for example by reaction with Raney nickel or an oxidation reagent such as hydrogen peroxide or nitric acid. The reactant of the third formula above may be thiourea in a tautomeric form. Ethyl a - methoxymethylene - a - fluoroacetate is prepared by reacting ethyl fluoroacetate, methyl formate and sodium enolate and then dimethyl sulphate. Sodium enolate of ethyl ethoxyalyfluoroacetate is prepared by reacting ethyl oxalate, ethyl fluoroacetate and sodium ethylate. Ethyl isovaleroylfluoroacetate is prepared by reacting the sodium salt of ethyl fluoroacetate and isovaleroyl chloride. Ethyl n-valeroyl-fluoroacetate is prepared in a similar manner. Sodium enolate of ethyl formylchloroacetate is prepared by reacting sodium ethylate, ethyl formate and ethylchloroacetate.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CS44962 | 1962-01-23 | ||
CS535662 | 1962-09-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB983723A true GB983723A (en) | 1965-02-17 |
Family
ID=25745286
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB284363A Expired GB983723A (en) | 1962-01-23 | 1963-01-23 | 4-hydroxy-5-halogeno pyrimidines and the preparation thereof |
Country Status (5)
Country | Link |
---|---|
AT (1) | AT242147B (en) |
BE (1) | BE627342A (en) |
DE (2) | DE1695773A1 (en) |
DK (1) | DK104063C (en) |
GB (1) | GB983723A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104926735A (en) * | 2015-06-16 | 2015-09-23 | 上海合全药物研发有限公司 | Industrial preparation method for 4-chlorine-5-fluorine-2-methyl pyrimidine |
-
1963
- 1963-01-21 BE BE627342A patent/BE627342A/en unknown
- 1963-01-22 DE DE19631695773 patent/DE1695773A1/en active Pending
- 1963-01-22 DE DE19631470233 patent/DE1470233A1/en active Pending
- 1963-01-22 DK DK26963A patent/DK104063C/en active
- 1963-01-22 AT AT51763A patent/AT242147B/en active
- 1963-01-23 GB GB284363A patent/GB983723A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104926735A (en) * | 2015-06-16 | 2015-09-23 | 上海合全药物研发有限公司 | Industrial preparation method for 4-chlorine-5-fluorine-2-methyl pyrimidine |
Also Published As
Publication number | Publication date |
---|---|
AT242147B (en) | 1965-08-25 |
BE627342A (en) | 1963-05-16 |
DE1695773A1 (en) | 1972-04-13 |
DE1470233A1 (en) | 1969-04-10 |
DK104063C (en) | 1966-03-28 |
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