1-methyl-1H-pyrazolo[3,4-d]pyrimidine-4,6(5H,7H)-dione synthesis
- Product Name:1-methyl-1H-pyrazolo[3,4-d]pyrimidine-4,6(5H,7H)-dione
- CAS Number:5401-15-0
- Molecular formula:C6H6N4O2
- Molecular Weight:166.14
18213-75-7
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Yield:5401-15-0 92%
Reaction Conditions:
in toluene;Product distribution / selectivity;Reflux;
Steps:
1
Alternatively, a mixture of 5 -amino- 1 -methyl- lH-pyrazolo-4-carboxylic acid amide 3 (700 mg, 5.00 mmol) and oxalyl chloride (1.2 equiv., 0.5 ml) in dry toluene (20 ml) was refluxed overnight. The reaction mixture was cooled down, precipitate filtered, washed with diethyl ether and dried to give l-methyl-l,7-dihydro-pyrazolo[3,4-t/]pyrimidine-4, 6-dione 4 (765 mg, 92%).
References:
WO2009/97446,2009,A1 Location in patent:Page/Page column 65
![4H-Pyrazolo[3,4-d]pyrimidin-4-one, 1,5,6,7-tetrahydro-1-methyl-6-thioxo-](/CAS/20210305/GIF/5334-27-0.gif)
5334-27-0
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5401-15-0
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