JPS51128998A - Process for preparing 4-hydroxy-1h- pyrazolo (3,4-d) pyrimidine - Google Patents
Process for preparing 4-hydroxy-1h- pyrazolo (3,4-d) pyrimidineInfo
- Publication number
- JPS51128998A JPS51128998A JP5205275A JP5205275A JPS51128998A JP S51128998 A JPS51128998 A JP S51128998A JP 5205275 A JP5205275 A JP 5205275A JP 5205275 A JP5205275 A JP 5205275A JP S51128998 A JPS51128998 A JP S51128998A
- Authority
- JP
- Japan
- Prior art keywords
- pyrazolo
- pyrimidine
- hydroxy
- preparing
- formula
- 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.)
- Granted
Links
Landscapes
- Nitrogen Condensed Heterocyclic Rings (AREA)
Abstract
PURPOSE: To prepare in a high yield and only one stage highly purified captioned compounds of formula (II) by heat treating with an acid catalyst, the reaction product which is obtained by reacting alkoxymethylenecyanoacetic acid alkylesters of formula (I) with formamide and hydrazine hydrate.
COPYRIGHT: (C)1976,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5205275A JPS51128998A (en) | 1975-05-01 | 1975-05-01 | Process for preparing 4-hydroxy-1h- pyrazolo (3,4-d) pyrimidine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5205275A JPS51128998A (en) | 1975-05-01 | 1975-05-01 | Process for preparing 4-hydroxy-1h- pyrazolo (3,4-d) pyrimidine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS51128998A true JPS51128998A (en) | 1976-11-10 |
JPS5310078B2 JPS5310078B2 (en) | 1978-04-11 |
Family
ID=12904032
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5205275A Granted JPS51128998A (en) | 1975-05-01 | 1975-05-01 | Process for preparing 4-hydroxy-1h- pyrazolo (3,4-d) pyrimidine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS51128998A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103965197A (en) * | 2013-04-15 | 2014-08-06 | 杭州领业医药科技有限公司 | Preparation of allopurinol crystal |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5733236A (en) * | 1980-08-08 | 1982-02-23 | Nisshinbo Ind Inc | Self adjusting device of drum brake |
-
1975
- 1975-05-01 JP JP5205275A patent/JPS51128998A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103965197A (en) * | 2013-04-15 | 2014-08-06 | 杭州领业医药科技有限公司 | Preparation of allopurinol crystal |
Also Published As
Publication number | Publication date |
---|---|
JPS5310078B2 (en) | 1978-04-11 |
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