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.675-11-6, name is 4,6-Difluoropyrimidin-2-amine, molecular formula is C4H3F2N3, molecular weight is 131.0835, as common compound, the synthetic route is as follows.category: pyrimidines
EXAMPLE 5 Preparation of 6-allyloxy-2-amino-4-fluoropyrimidine (Variant A) STR13 1.14 g (0.0382 mol) of 80% sodium hydride (emulsion in linseed oil) were added at 25 C. under a nitrogen atmosphere to 70 ml of allyl alcohol. To the clear solution obtained after stirring at 40 C. for 20 minutes were added 5.0 g (0.0382 mol) of 2-amino-4,6-difluoropyrimidine, and the mixture was then stirred at 97 C. for 1.5 hours. To work up, the excess alcohol was removed by distillation under reduced pressure, the residue was taken up in methylene chloride, and the solution was washed with water, dried over magnesium sulfate and then freed of solvent. The viscous oil obtained in this way crystallized on trituration with n-pentane. 4.6 g (71.2% of theory) of the title compound of melting point 62-66 C. were obtained after filtering off, washing with water and drying.
At the same time, in my other blogs, there are other synthetic methods of this type of compound,675-11-6, 4,6-Difluoropyrimidin-2-amine, and friends who are interested can also refer to it.
Reference:
Patent; BASF Aktiengesellschaft; US5011927; (1991); A;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia