With the rapid development and complex challenges of chemical substances, the synthesis of new drugs is usually one of the most effective ways to increase yield.42754-96-1, name is 4,6-Dichloro-1H-pyrazolo[3,4-d]pyrimidine, molecular formula is C5H2Cl2N4, molecular weight is 189, as common compound, the synthetic route is as follows.name: 4,6-Dichloro-1H-pyrazolo[3,4-d]pyrimidine
1-(4-{4-(3,6-dihydro-2H-pyran-4-yl)-1-[1-(pyridin-3-ylcarbonyl)piperidin-4-yl]-1H-pyrazolo[3,4-d]pyrimidin-6-yl}phenyl)-3-methylurea (Scheme 13)Example 5Step 14,6-dichloro-1H-pyrazolo[3,4-d]pyrimidine, prepared according to Robins (J Am Chem. Soc. Vol. 79, 1957, 6407-6415) was reacted with 3,4-dihydro-2H-pyran and catalytic p-toluenesulfonic acid in ethyl acetate at 70 C. The reaction mixture was diluted with saturated aqueous sodium hydrogen carbonate solution and extracted with ethyl acetate. After concentration of organic layers, the crude material was purified by flash chromatography to provide 4,6-dichloro-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazolo[3,4-d]pyrimidine.
At the same time, in my other blogs, there are other synthetic methods of this type of compound,42754-96-1, 4,6-Dichloro-1H-pyrazolo[3,4-d]pyrimidine, and friends who are interested can also refer to it.
Reference:
Patent; Wyeth; US2009/192176; (2009); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia