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.4316-97-6, name is 4,6-Dichloro-5-methylpyrimidine, molecular formula is C5H4Cl2N2, molecular weight is 163.01, as common compound, the synthetic route is as follows.Application In Synthesis of 4,6-Dichloro-5-methylpyrimidine
Preparation of 5-(6-Chloro-5-methylpyrimidin-4-yl)-1 -methyl-1 ,4,5,6- tetrahvdropyrrolor3,4-clpyrazole1-Methyl-1 ,4,5,6-tetrahydropyrrolo[3,4-c]pyrazole bis-hydrochloride salt (2.00 g, 10.2 mmol) and 4,6-dichloro-5-methylpyrimidine (1 .66 g, 10.2 mmol) were suspended in tetrahydrofuran (51 ml.) at room temperature. To this was added triethylamine (4.41 ml_, 31.6 mmol), which caused cloudiness in the mixture and led to a brown solid sticking to the flask walls. This mixture was stirred at room temperature for 4 hours and then heated 50 degrees Celsius for an additional 19 hours. The reaction mixture was cooled to room temperature and diluted with water (100 ml_). This mixture was extracted with ethyl acetate (3 x 100 ml_). The organic extracts were pooled, washed with brine, dried over sodium sulfate, and filtered. The filtrate was reduced to dryness under vacuum to yield the title compound as a light brown solid (1.95 g, 78%), which was used in the next step without further purification. 1 H NMR (500 MHz, deuterochloroform) delta 2.54 (s, 3 H) 3.88 (s, 3 H) 4.90 (app. d, J=3.66 Hz, 4 H) 7.28 (s, 1 H) 8.29 (s, 1 H).
At the same time, in my other blogs, there are other synthetic methods of this type of compound,4316-97-6, 4,6-Dichloro-5-methylpyrimidine, and friends who are interested can also refer to it.
Reference:
Patent; PFIZER INC.; MASCITTI, Vincent; MCCLURE, Kim Francis; MUNCHHOF, Michael John; ROBINSON, Ralph Pelton; WO2011/61679; (2011); A1;,
Pyrimidine | C4H4N2 – PubChem,
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