Synthetic Route of 63931-21-5, 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.63931-21-5, name is 5-Bromo-2,4,6-trichloropyrimidine, molecular formula is C4BrCl3N2, molecular weight is 262.3192, as common compound, the synthetic route is as follows.
5-Bromo-2,4,6-trichloropyrimidine (1.28 g, 4.88 mmol) and 3,3-difluorocyclobutan- amine hydrochloride (715 mg, 4.98 mmol) were suspended in acetonitrile (6 mL) and N,N- diisopropylethylamine (1.55 g, 2.1 mL, 12 mmol) was added at room temperature. The resulting yellow solution was stirred for 7 h at room temperature. After that, the reaction mixture was concentrated in vacuo and the residue was purified by column chromatography (silica gel, 80 g, eluting with ethyl acetate / n-heptane, gradient 0: 100 to 10:90) to yield, after drying in vacuo (40C, 5 mbar), the title compound as a pale yellow oil (1.188 g, 73%). HPLC (method (0254) LCMS_fastgradient) tR = 1.31 min. 1H NMR (CDC13, 300 MHz): delta 2.48-2.67 (m, 2 H), 3.08-3.25 (m, 2 H), 4.39-4.53 (m, 1 H), 5.78-5.90 (m, 1 H). MS (ES+) m/z 330.0, 332.0, 334.0 [M+H, Br & 2 CI isotopes] .
Statistics shows that 63931-21-5 is playing an increasingly important role. we look forward to future research findings about 5-Bromo-2,4,6-trichloropyrimidine.
Reference:
Patent; F. HOFFMANN-LA ROCHE AG; HOFFMANN-LA ROCHE INC.; BARTELS, Bjoern; JAKOB-ROETNE, Roland; LIMBERG, Anja; NEIDHART, Werner; RATNI, Hasane; REUTLINGER, Michael; STEINER, Sandra; (89 pag.)WO2018/11164; (2018); A1;,
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